diff --git a/check_process b/check_process
deleted file mode 100644
index 4766f13..0000000
--- a/check_process
+++ /dev/null
@@ -1,22 +0,0 @@
-;; Test complet
-	; Manifest
-		domain="domain.tld"
-		admin="john"
-		password="password"
-	; Checks
-		pkg_linter=1
-		setup_sub_dir=0
-		setup_root=1
-		setup_nourl=0
-		setup_private=0
-		setup_public=1
-		upgrade=1
-		# 20.01.2022~ynh1
-		upgrade=1	from_commit=52c1e2d4fbf5221e32025bc28939b93a64622031
-		backup_restore=1
-		multi_instance=1
-		port_already_use=1
-		change_url=0
-;;; Options
-Email=
-Notification=none
diff --git a/conf/app.src b/conf/app.src
deleted file mode 100644
index d543ead..0000000
--- a/conf/app.src
+++ /dev/null
@@ -1,7 +0,0 @@
-SOURCE_URL=https://gitlab.com/bashrc2/epicyon/-/archive/90a31c45ee2fc1c4c160f029c94be0911d14a8f5/epicyon-90a31c45ee2fc1c4c160f029c94be0911d14a8f5.tar.gz
-SOURCE_SUM=7807065c6d68073e6f8b4370297b22c659d5ea9e4a8609dbfb2332d0eb4e990d
-SOURCE_SUM_PRG=sha256sum
-SOURCE_FORMAT=tar.gz
-SOURCE_IN_SUBDIR=true
-SOURCE_FILENAME=
-SOURCE_EXTRACT=true
diff --git a/conf/systemd.service b/conf/systemd.service
index f33a0ea..b1556db 100644
--- a/conf/systemd.service
+++ b/conf/systemd.service
@@ -6,8 +6,8 @@ After=network.target
 Type=simple
 User=__APP__
 Group=__APP__
-WorkingDirectory=__FINALPATH__/
-ExecStart=/usr/bin/python3 __FINALPATH__/epicyon.py --port 443 --proxy __PORT__ --domain __DOMAIN__ --registration open --log_login_failures
+WorkingDirectory=__INSTALL_DIR__/
+ExecStart=/usr/bin/python3 __INSTALL_DIR__/epicyon.py --port 443 --proxy __PORT__ --domain __DOMAIN__ --registration open --log_login_failures
 Environment=USER=__APP__
 Environment=PYTHONUNBUFFERED=true
 Restart=always
diff --git a/doc/DISCLAIMER.md b/doc/DISCLAIMER.md
deleted file mode 100644
index e69de29..0000000
diff --git a/doc/DISCLAIMER_fr.md b/doc/DISCLAIMER_fr.md
deleted file mode 100644
index e69de29..0000000
diff --git a/manifest.json b/manifest.json
deleted file mode 100644
index a243f38..0000000
--- a/manifest.json
+++ /dev/null
@@ -1,43 +0,0 @@
-{
-    "name": "Epicyon",
-    "id": "epicyon",
-    "packaging_format": 1,
-    "description": {
-        "en": "Federated social network server",
-        "fr": "Serveur de réseau social fédéré"
-    },
-    "version": "2023.03.17~ynh1",
-    "url": "https://epicyon.net/",
-    "upstream": {
-        "license": "AGPL-1.0-or-later",
-        "website": "https://epicyon.net",
-        "code": "https://gitlab.com/bashrc2/epicyon/"
-    },
-    "license": "AGPL-1.0-or-later",
-    "maintainer": {
-        "name": "Anmol Sharma"
-    },
-    "requirements": {
-        "yunohost": ">= 4.3.0"
-    },
-    "multi_instance": true,
-    "services": [
-        "nginx"
-    ],
-    "arguments": {
-        "install": [
-            {
-                "name": "domain",
-                "type": "domain"
-            },
-            {
-                "name": "admin",
-                "type": "user"
-            },
-            {
-                "name": "password",
-                "type": "password"
-            }
-        ]
-    }
-}
diff --git a/manifest.toml b/manifest.toml
new file mode 100644
index 0000000..f1820ab
--- /dev/null
+++ b/manifest.toml
@@ -0,0 +1,73 @@
+#:schema https://raw.githubusercontent.com/YunoHost/apps/master/schemas/manifest.v2.schema.json
+
+packaging_format = 2
+
+id = "epicyon"
+name = "Epicyon"
+description.en = "Federated social network server"
+description.fr = "Serveur de réseau social fédéré"
+
+version = "2023.03.17~ynh1"
+
+maintainers = ["Anmol Sharma"]
+
+[upstream]
+license = "AGPL-1.0-or-later"
+website = "https://epicyon.net"
+code = "https://gitlab.com/bashrc2/epicyon/"
+fund = "https://www.patreon.com/freedombone"
+
+[integration]
+yunohost = ">= 4.3.0"
+architectures = "all"
+multi_instance = true
+ldap = "not_relevant"
+sso = "not_relevant"
+disk = "50M" # FIXME: replace with an **estimate** minimum disk requirement. e.g. 20M, 400M, 1G, ...
+ram.build = "50M" # FIXME: replace with an **estimate** minimum ram requirement. e.g. 50M, 400M, 1G, ...
+ram.runtime = "50M" # FIXME: replace with an **estimate** minimum ram requirement. e.g. 50M, 400M, 1G, ...
+
+[install]
+    [install.domain]
+    type = "domain"
+
+    [install.admin]
+    type = "user"
+
+    [install.password]
+    type = "password"
+
+[resources]
+    [resources.sources.main]
+    url = "https://gitlab.com/bashrc2/epicyon/-/archive/90a31c45ee2fc1c4c160f029c94be0911d14a8f5/epicyon-90a31c45ee2fc1c4c160f029c94be0911d14a8f5.tar.gz"
+    sha256 = "7807065c6d68073e6f8b4370297b22c659d5ea9e4a8609dbfb2332d0eb4e990d"
+
+    autoupdate.strategy = "latest_gitlab_tag"
+
+    [resources.system_user]
+
+    [resources.install_dir]
+
+    [resources.permissions]
+    main.url = "/"
+    main.auth_header = false
+
+    [resources.ports]
+    main.default = 8095
+
+    [resources.apt]
+    packages = [
+        "python3-socks",
+        "imagemagick",
+        "python3-setuptools",
+        "python3-cryptography",
+        "python3-dateutil",
+        "python3-idna",
+        "python3-requests",
+        "python3-flake8",
+        "python3-django-timezone-field",
+        "python3-pyqrcode",
+        "python3-png",
+        "python3-bandit",
+        "libimage-exiftool-perl",
+    ]
diff --git a/scripts/_common.sh b/scripts/_common.sh
index b5dd90e..944a65e 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -4,9 +4,6 @@
 # COMMON VARIABLES
 #=================================================
 
-# dependencies used by the app
-pkg_dependencies="python3-socks imagemagick python3-setuptools python3-cryptography python3-dateutil python3-idna python3-requests python3-flake8 python3-django-timezone-field python3-pyqrcode python3-png python3-bandit libimage-exiftool-perl"
-
 #=================================================
 # PERSONAL HELPERS
 #=================================================
diff --git a/scripts/backup b/scripts/backup
index 8ecf36d..38d96c5 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -10,27 +10,6 @@
 source ../settings/scripts/_common.sh
 source /usr/share/yunohost/helpers
 
-#=================================================
-# MANAGE SCRIPT FAILURE
-#=================================================
-
-ynh_clean_setup () {
-	true
-}
-# Exit if an error occurs during the execution of the script
-ynh_abort_if_errors
-
-#=================================================
-# LOAD SETTINGS
-#=================================================
-ynh_print_info --message="Loading installation settings..."
-
-app=$YNH_APP_INSTANCE_NAME
-
-final_path=$(ynh_app_setting_get --app=$app --key=final_path)
-public_path=$(ynh_app_setting_get --app=$app --key=public_path)
-domain=$(ynh_app_setting_get --app=$app --key=domain)
-
 #=================================================
 # DECLARE DATA AND CONF FILES TO BACKUP
 #=================================================
@@ -40,19 +19,14 @@ ynh_print_info --message="Declaring files to be backed up..."
 # BACKUP THE APP MAIN DIR
 #=================================================
 
-ynh_backup --src_path="$final_path"
-ynh_backup --src_path="$public_path"
+ynh_backup --src_path="$install_dir"
 
 #=================================================
-# BACKUP THE NGINX CONFIGURATION
+# SYSTEM CONFIGURATION
 #=================================================
 
 ynh_backup --src_path="/etc/nginx/conf.d/$domain.d/$app.conf"
 
-#=================================================
-# BACKUP SYSTEMD
-#=================================================
-
 ynh_backup --src_path="/etc/systemd/system/$app.service"
 
 #=================================================
diff --git a/scripts/change_url b/scripts/change_url
index 3fb2f2f..ed935fe 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -9,64 +9,6 @@
 source _common.sh
 source /usr/share/yunohost/helpers
 
-#=================================================
-# RETRIEVE ARGUMENTS
-#=================================================
-
-old_domain=$YNH_APP_OLD_DOMAIN
-old_path=$YNH_APP_OLD_PATH
-
-new_domain=$YNH_APP_NEW_DOMAIN
-new_path=$YNH_APP_NEW_PATH
-
-app=$YNH_APP_INSTANCE_NAME
-
-#=================================================
-# LOAD SETTINGS
-#=================================================
-ynh_script_progression --message="Loading installation settings..." --weight=1
-
-# Needed for helper "ynh_add_nginx_config"
-final_path=$(ynh_app_setting_get --app=$app --key=final_path)
-
-# Add settings here as needed by your application
-#db_name=$(ynh_app_setting_get --app=$app --key=db_name)
-#db_user=$db_name
-#db_pwd=$(ynh_app_setting_get --app=$app --key=db_pwd)
-
-#=================================================
-# BACKUP BEFORE CHANGE URL THEN ACTIVE TRAP
-#=================================================
-ynh_script_progression --message="Backing up the app before changing its URL (may take a while)..." --weight=1
-
-# Backup the current version of the app
-ynh_backup_before_upgrade
-ynh_clean_setup () {
-	# Remove the new domain config file, the remove script won't do it as it doesn't know yet its location.
-	ynh_secure_remove --file="/etc/nginx/conf.d/$new_domain.d/$app.conf"
-
-	# Restore it if the upgrade fails
-	ynh_restore_upgradebackup
-}
-# Exit if an error occurs during the execution of the script
-ynh_abort_if_errors
-
-#=================================================
-# CHECK WHICH PARTS SHOULD BE CHANGED
-#=================================================
-
-change_domain=0
-if [ "$old_domain" != "$new_domain" ]
-then
-	change_domain=1
-fi
-
-change_path=0
-if [ "$old_path" != "$new_path" ]
-then
-	change_path=1
-fi
-
 #=================================================
 # STANDARD MODIFICATIONS
 #=================================================
@@ -74,36 +16,14 @@ fi
 #=================================================
 ynh_script_progression --message="Stopping a systemd service..." --weight=1
 
-ynh_systemd_action --service_name=$app --action="stop" --log_path="/var/log/$app/$app.log"
+ynh_systemd_action --service_name="$app" --action="stop" --log_path="/var/log/$app/$app.log"
 
 #=================================================
 # MODIFY URL IN NGINX CONF
 #=================================================
 ynh_script_progression --message="Updating NGINX web server configuration..." --weight=1
 
-nginx_conf_path=/etc/nginx/conf.d/$old_domain.d/$app.conf
-
-# Change the path in the NGINX config file
-if [ $change_path -eq 1 ]
-then
-	# Make a backup of the original NGINX config file if modified
-	ynh_backup_if_checksum_is_different --file="$nginx_conf_path"
-	# Set global variables for NGINX helper
-	domain="$old_domain"
-	path_url="$new_path"
-	# Create a dedicated NGINX config
-	ynh_add_nginx_config
-fi
-
-# Change the domain for NGINX
-if [ $change_domain -eq 1 ]
-then
-	# Delete file checksum for the old conf file location
-	ynh_delete_file_checksum --file="$nginx_conf_path"
-	mv $nginx_conf_path /etc/nginx/conf.d/$new_domain.d/$app.conf
-	# Store file checksum for the new config file location
-	ynh_store_file_checksum --file="/etc/nginx/conf.d/$new_domain.d/$app.conf"
-fi
+ynh_change_url_nginx_config
 
 #=================================================
 # GENERIC FINALISATION
@@ -113,14 +33,7 @@ fi
 ynh_script_progression --message="Starting a systemd service..." --weight=1
 
 # Start a systemd service
-ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/$app.log"
-
-#=================================================
-# RELOAD NGINX
-#=================================================
-ynh_script_progression --message="Reloading NGINX web server..." --weight=1
-
-ynh_systemd_action --service_name=nginx --action=reload
+ynh_systemd_action --service_name="$app" --action="start" --log_path="/var/log/$app/$app.log"
 
 #=================================================
 # END OF SCRIPT
diff --git a/scripts/install b/scripts/install
index ff278d0..d7cedf3 100755
--- a/scripts/install
+++ b/scripts/install
@@ -10,105 +10,24 @@ source _common.sh
 source /usr/share/yunohost/helpers
 
 #=================================================
-# MANAGE SCRIPT FAILURE
+# INITIALIZE AND STORE SETTINGS
 #=================================================
 
-ynh_clean_setup () {
-	ynh_clean_check_starting
-}
-# Exit if an error occurs during the execution of the script
-ynh_abort_if_errors
-
-#=================================================
-# RETRIEVE ARGUMENTS FROM THE MANIFEST
-#=================================================
-
-domain=$YNH_APP_ARG_DOMAIN
-path_url="/"
-admin=$YNH_APP_ARG_ADMIN
-password=$YNH_APP_ARG_PASSWORD
-
-app=$YNH_APP_INSTANCE_NAME
-
 email=$(ynh_user_get_info --username=$admin --key="mail")
 
-#=================================================
-# CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
-#=================================================
-ynh_script_progression --message="Validating installation parameters..." --weight=1
-
-final_path=/opt/yunohost/$app
-public_path=/var/www/$app
-test ! -e "$final_path" || ynh_die --message="This path already contains a folder"
-test ! -e "$public_path" || ynh_die --message="This path already contains a folder"
-
-# Register (book) web path
-ynh_webpath_register --app=$app --domain=$domain --path_url=$path_url
-
-#=================================================
-# STORE SETTINGS FROM MANIFEST
-#=================================================
-ynh_script_progression --message="Storing installation settings..." --weight=1
-
-ynh_app_setting_set --app=$app --key=domain --value=$domain
-ynh_app_setting_set --app=$app --key=path --value=$path_url
-ynh_app_setting_set --app=$app --key=admin --value=$admin
-
-#=================================================
-# STANDARD MODIFICATIONS
-#=================================================
-# FIND AND OPEN A PORT
-#=================================================
-ynh_script_progression --message="Finding an available port..." --weight=1
-
-# Find an available port
-port=$(ynh_find_port --port=8095)
-ynh_app_setting_set --app=$app --key=port --value=$port
-
-#=================================================
-# INSTALL DEPENDENCIES
-#=================================================
-ynh_script_progression --message="Installing dependencies..." --weight=1
-
-ynh_install_app_dependencies $pkg_dependencies
-
-#=================================================
-# CREATE DEDICATED USER
-#=================================================
-ynh_script_progression --message="Configuring system user..." --weight=1
-
-# Create a system user
-ynh_system_user_create --username=$app --home_dir="$final_path"
-
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
 ynh_script_progression --message="Setting up source files..." --weight=1
 
-ynh_app_setting_set --app=$app --key=final_path --value=$final_path
-ynh_app_setting_set --app=$app --key=public_path --value=$public_path
 # Download, check integrity, uncompress and patch the source from app.src
-ynh_setup_source --dest_dir="$final_path"
+ynh_setup_source --dest_dir="$install_dir"
 
-mkdir $public_path
-mkdir -p $final_path/accounts/newsmirror
-ln -s $final_path/accounts/newsmirror $public_path/newsmirror
+mkdir -p "$install_dir/accounts/newsmirror"
 
-chmod 750 "$final_path"
-chmod -R o-rwx "$final_path"
-chown -R $app:www-data "$final_path"
-
-chmod 750 $public_path
-chmod -R o-rwx $public_path
-chown -R $app:www-data $public_path
-
-#=================================================
-# NGINX CONFIGURATION
-#=================================================
-ynh_script_progression --message="Configuring NGINX web server..." --weight=1
-
-# Create a dedicated NGINX config
-ynh_add_nginx_config
+chmod 750 "$install_dir"
+chmod -R o-rwx "$install_dir"
+chown -R "$app:www-data" "$install_dir"
 
 #=================================================
 # SPECIFIC SETUP
@@ -118,24 +37,21 @@ ynh_add_nginx_config
 ynh_script_progression --message="Creating admin user" --weight=1
 
 # Create admin
-python3 $final_path/epicyon.py --addaccount=$admin --password=$password --domain=$domain
+ynh_exec_as "$app" python3 "$install_dir/epicyon.py" --addaccount="$admin" --password=$password --domain=$domain
 
 #=================================================
-# SETUP SYSTEMD
+# SYSTEM CONFIGURATION
 #=================================================
-ynh_script_progression --message="Configuring a systemd service..." --weight=1
+ynh_script_progression --message="Adding system configurations related to $app..." --weight=1
+
+# Create a dedicated NGINX config
+ynh_add_nginx_config
 
 # Create a dedicated systemd config
 ynh_add_systemd_config
+yunohost service add "$app" --description="Federated social network server" --log="/var/log/$app/$app.log"
 
-#=================================================
-# GENERIC FINALIZATION
-#=================================================
-# INTEGRATE SERVICE IN YUNOHOST
-#=================================================
-ynh_script_progression --message="Integrating service in YunoHost..." --weight=1
-
-yunohost service add $app --description="Federated social network server" --log="/var/log/$app/$app.log"
+ynh_exec_warn find "$install_dir"
 
 #=================================================
 # START SYSTEMD SERVICE
@@ -143,23 +59,7 @@ yunohost service add $app --description="Federated social network server" --log=
 ynh_script_progression --message="Starting a systemd service..." --weight=1
 
 # Start a systemd service
-ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/$app.log"
-
-#=================================================
-# SETUP SSOWAT
-#=================================================
-ynh_script_progression --message="Configuring permissions..." --weight=1
-
-ynh_permission_update --permission="main" --add="visitors"
-
-ynh_permission_url --permission="main" --auth_header="false"
-
-#=================================================
-# RELOAD NGINX
-#=================================================
-ynh_script_progression --message="Reloading NGINX web server..." --weight=1
-
-ynh_systemd_action --service_name=nginx --action=reload
+ynh_systemd_action --service_name="$app" --action="start" --log_path="/var/log/$app/$app.log"
 
 #=================================================
 # END OF SCRIPT
diff --git a/scripts/remove b/scripts/remove
index 68f57cc..79b2de3 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -10,73 +10,21 @@ source _common.sh
 source /usr/share/yunohost/helpers
 
 #=================================================
-# LOAD SETTINGS
-#=================================================
-ynh_script_progression --message="Loading installation settings..." --weight=1
-
-app=$YNH_APP_INSTANCE_NAME
-
-domain=$(ynh_app_setting_get --app=$app --key=domain)
-port=$(ynh_app_setting_get --app=$app --key=port)
-final_path=$(ynh_app_setting_get --app=$app --key=final_path)
-public_path=$(ynh_app_setting_get --app=$app --key=public_path)
-
-#=================================================
-# STANDARD REMOVE
-#=================================================
-# REMOVE SERVICE INTEGRATION IN YUNOHOST
+# REMOVE SYSTEM CONFIGURATIONS
 #=================================================
+ynh_script_progression --message="Removing system configurations related to $app..." --weight=1
 
 # Remove the service from the list of services known by YunoHost (added from `yunohost service add`)
-if ynh_exec_warn_less yunohost service status $app >/dev/null
-then
-	ynh_script_progression --message="Removing $app service integration..." --weight=1
-	yunohost service remove $app
+if ynh_exec_warn_less yunohost service status "$app" >/dev/null; then
+    yunohost service remove "$app"
 fi
 
-#=================================================
-# STOP AND REMOVE SERVICE
-#=================================================
-ynh_script_progression --message="Stopping and removing the systemd service..." --weight=1
-
 # Remove the dedicated systemd config
 ynh_remove_systemd_config
 
-#=================================================
-# REMOVE APP MAIN DIR
-#=================================================
-ynh_script_progression --message="Removing app main directory..."  --weight=1
-
-# Remove the app directory securely
-ynh_secure_remove --file="$final_path"
-ynh_secure_remove --file="$public_path"
-
-#=================================================
-# REMOVE NGINX CONFIGURATION
-#=================================================
-ynh_script_progression --message="Removing NGINX web server configuration..." --weight=1
-
 # Remove the dedicated NGINX config
 ynh_remove_nginx_config
 
-#=================================================
-# REMOVE DEPENDENCIES
-#=================================================
-ynh_script_progression --message="Removing dependencies..."  --weight=1
-
-# Remove metapackage and its dependencies
-ynh_remove_app_dependencies
-
-#=================================================
-# GENERIC FINALIZATION
-#=================================================
-# REMOVE DEDICATED USER
-#=================================================
-ynh_script_progression --message="Removing the dedicated system user..." --weight=1
-
-# Delete a system user
-ynh_system_user_delete --username=$app
-
 #=================================================
 # END OF SCRIPT
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index 0922b0e..d5df482 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -10,111 +10,36 @@
 source ../settings/scripts/_common.sh
 source /usr/share/yunohost/helpers
 
-#=================================================
-# MANAGE SCRIPT FAILURE
-#=================================================
-
-ynh_clean_setup () {
-	ynh_clean_check_starting
-}
-# Exit if an error occurs during the execution of the script
-ynh_abort_if_errors
-
-#=================================================
-# LOAD SETTINGS
-#=================================================
-ynh_script_progression --message="Loading installation settings..." --weight=1
-
-app=$YNH_APP_INSTANCE_NAME
-
-domain=$(ynh_app_setting_get --app=$app --key=domain)
-path_url=$(ynh_app_setting_get --app=$app --key=path)
-final_path=$(ynh_app_setting_get --app=$app --key=final_path)
-public_path=$(ynh_app_setting_get --app=$app --key=public_path)
-
-#=================================================
-# CHECK IF THE APP CAN BE RESTORED
-#=================================================
-ynh_script_progression --message="Validating restoration parameters..." --weight=1
-
-test ! -d $final_path \
-	|| ynh_die --message="There is already a directory: $final_path "
-
-#=================================================
-# STANDARD RESTORATION STEPS
-#=================================================
-# RECREATE THE DEDICATED USER
-#=================================================
-ynh_script_progression --message="Recreating the dedicated system user..." --weight=1
-
-# Create the dedicated user (if not existing)
-ynh_system_user_create --username=$app --home_dir="$final_path"
-
 #=================================================
 # RESTORE THE APP MAIN DIR
 #=================================================
 ynh_script_progression --message="Restoring the app main directory..." --weight=1
 
-ynh_restore_file --origin_path="$final_path"
+ynh_restore_file --origin_path="$install_dir"
 
-chmod 750 "$final_path"
-chmod -R o-rwx "$final_path"
-chown -R $app:www-data "$final_path"
-
-ynh_restore_file --origin_path="$public_path"
-
-chmod 750 $public_path
-chmod -R o-rwx $public_path
-chown -R $app:www-data $public_path
-
-ln -s $final_path/accounts/newsmirror $public_path/newsmirror
+chmod 750 "$install_dir"
+chmod -R o-rwx "$install_dir"
+chown -R $app:www-data "$install_dir"
 
 #=================================================
-# SPECIFIC RESTORATION
+# RESTORE SYSTEM CONFIGURATIONS
 #=================================================
-# REINSTALL DEPENDENCIES
-#=================================================
-ynh_script_progression --message="Reinstalling dependencies..." --weight=1
-
-# Define and install dependencies
-ynh_install_app_dependencies $pkg_dependencies
-
-#=================================================
-# RESTORE THE NGINX CONFIGURATION
-#=================================================
-ynh_script_progression --message="Restoring the NGINX web server configuration..."
+ynh_script_progression --message="Restoring system configurations related to $app..." --weight=1
 
 ynh_restore_file --origin_path="/etc/nginx/conf.d/$domain.d/$app.conf"
 
-#=================================================
-# RESTORE SYSTEMD
-#=================================================
-ynh_script_progression --message="Restoring the systemd configuration..." --weight=1
-
 ynh_restore_file --origin_path="/etc/systemd/system/$app.service"
-systemctl enable $app.service --quiet
-
-#=================================================
-# INTEGRATE SERVICE IN YUNOHOST
-#=================================================
-ynh_script_progression --message="Integrating service in YunoHost..." --weight=1
-
-yunohost service add $app --description="Federated social network server" --log="/var/log/$app/$app.log"
-
-#=================================================
-# START SYSTEMD SERVICE
-#=================================================
-ynh_script_progression --message="Starting a systemd service..." --weight=1
-
-ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/$app.log"
+systemctl enable "$app.service" --quiet
+yunohost service add "$app" --description="Federated social network server" --log="/var/log/$app/$app.log"
 
 #=================================================
 # GENERIC FINALIZATION
 #=================================================
-# RELOAD NGINX
+# RELOAD NGINX AND PHP-FPM OR THE APP SERVICE
 #=================================================
-ynh_script_progression --message="Reloading NGINX web server..." --weight=1
+ynh_script_progression --message="Reloading NGINX web server and $app's service..." --weight=1
 
+ynh_systemd_action --service_name="$app" --action="start" --log_path="/var/log/$app/$app.log"
 ynh_systemd_action --service_name=nginx --action=reload
 
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index bfe4c0a..b0c957f 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -9,41 +9,6 @@
 source _common.sh
 source /usr/share/yunohost/helpers
 
-#=================================================
-# LOAD SETTINGS
-#=================================================
-ynh_script_progression --message="Loading installation settings..."  --weight=1
-
-app=$YNH_APP_INSTANCE_NAME
-
-domain=$(ynh_app_setting_get --app=$app --key=domain)
-path_url=$(ynh_app_setting_get --app=$app --key=path)
-final_path=$(ynh_app_setting_get --app=$app --key=final_path)
-public_path=$(ynh_app_setting_get --app=$app --key=public_path)
-port=$(ynh_app_setting_get --app=$app --key=port)
-
-#=================================================
-# CHECK VERSION
-#=================================================
-ynh_script_progression --message="Checking version..."
-
-upgrade_type=$(ynh_check_app_version_changed)
-
-#=================================================
-# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
-#=================================================
-ynh_script_progression --message="Backing up the app before upgrading (may take a while)..."  --weight=1
-
-# Backup the current version of the app
-ynh_backup_before_upgrade
-ynh_clean_setup () {
-	ynh_clean_check_starting
-	# Restore it if the upgrade fails
-	ynh_restore_upgradebackup
-}
-# Exit if an error occurs during the execution of the script
-ynh_abort_if_errors
-
 #=================================================
 # STANDARD UPGRADE STEPS
 #=================================================
@@ -53,74 +18,36 @@ ynh_script_progression --message="Stopping a systemd service..." --weight=1
 
 ynh_systemd_action --service_name=$app --action="stop" --log_path="/var/log/$app/$app.log"
 
-#=================================================
-# CREATE DEDICATED USER
-#=================================================
-ynh_script_progression --message="Making sure dedicated system user exists..." --weight=1
-
-# Create a dedicated user (if not existing)
-ynh_system_user_create --username=$app --home_dir="$final_path"
-
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
+ynh_script_progression --message="Upgrading source files..." --weight=1
 
-if [ "$upgrade_type" == "UPGRADE_APP" ]
-then
-	ynh_script_progression --message="Upgrading source files..." --weight=1
+# Download, check integrity, uncompress and patch the source from app.src
+ynh_setup_source --dest_dir="$install_dir"
 
-	# Download, check integrity, uncompress and patch the source from app.src
-	ynh_setup_source --dest_dir="$final_path"
-fi
-
-chmod 750 "$final_path"
-chmod -R o-rwx "$final_path"
-chown -R $app:www-data "$final_path"
-chown -R $app: $public_path
+chmod 750 "$install_dir"
+chmod -R o-rwx "$install_dir"
+chown -R "$app:www-data" "$install_dir"
 
 #=================================================
-# UPGRADE DEPENDENCIES
+# REAPPLY SYSTEM CONFIGURATIONS
 #=================================================
-ynh_script_progression --message="Upgrading dependencies..." --weight=1
-
-ynh_install_app_dependencies $pkg_dependencies
-
-#=================================================
-# NGINX CONFIGURATION
-#=================================================
-ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=1
+ynh_script_progression --message="Upgrading system configurations related to $app..." --weight=1
 
 # Create a dedicated NGINX config
 ynh_add_nginx_config
 
-#=================================================
-# SETUP SYSTEMD
-#=================================================
-ynh_script_progression --message="Upgrading systemd configuration..." --weight=1
-
 # Create a dedicated systemd config
 ynh_add_systemd_config
-
-#=================================================
-# INTEGRATE SERVICE IN YUNOHOST
-#=================================================
-ynh_script_progression --message="Integrating service in YunoHost..." --weight=1
-
-yunohost service add $app --description="Federated social network server" --log="/var/log/$app/$app.log"
+yunohost service add "$app" --description="Federated social network server" --log="/var/log/$app/$app.log"
 
 #=================================================
 # START SYSTEMD SERVICE
 #=================================================
 ynh_script_progression --message="Starting a systemd service..." --weight=1
 
-ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/$app.log"
-
-#=================================================
-# RELOAD NGINX
-#=================================================
-ynh_script_progression --message="Reloading NGINX web server..." --weight=1
-
-ynh_systemd_action --service_name=nginx --action=reload
+ynh_systemd_action --service_name="$app" --action="start" --log_path="/var/log/$app/$app.log"
 
 #=================================================
 # END OF SCRIPT
diff --git a/tests.toml b/tests.toml
new file mode 100644
index 0000000..b9e0bce
--- /dev/null
+++ b/tests.toml
@@ -0,0 +1,7 @@
+#:schema https://raw.githubusercontent.com/YunoHost/apps/master/schemas/tests.v1.schema.json
+
+test_format = 1.0
+
+[default]
+
+    test_upgrade_from.52c1e2d4fbf5221e32025bc28939b93a64622031.name = "20.01.2022~ynh1"