diff --git a/README.md b/README.md
index 8be2894..9d0bc5d 100644
--- a/README.md
+++ b/README.md
@@ -19,19 +19,19 @@ ztncui is a web user interface for a standalone ZeroTier network controller. It
 
 ## Configuration
 
-How to configure this app: by an admin panel, a plain file with SSH, or any other way.
+No particular configuration is needed after initial installation.
 
 ## Documentation
 
- * Official documentation: Link to the official documentation of this app
+ * [Official documentation](https://key-networks.com/ztncui/)
  * YunoHost documentation: If specific documentation is needed, feel free to contribute.
 
 ## YunoHost specific features
 
 #### Multi-users support
 
- * No LDAP and HTTP auth supported. ztncui implements its own `passwd` file.
- * Can the app be used by multiple users? Yes. See `/opt/key-networks/ztncui/src/etc/passwd`
+ * No LDAP and HTTP auth supported.
+ * Can the app be used by multiple users? Yes, you have to add them manually in `/opt/key-networks/ztncui/src/etc/passwd`, see ztncui documentation.
 
 #### Supported architectures
 
@@ -40,7 +40,7 @@ How to configure this app: by an admin panel, a plain file with SSH, or any othe
 
 ## Limitations
 
-* [ZeroTier for YunoHost](https://github.com/tituspijean/zerotier_ynh) has to be installed beforehand.
+* [ZeroTier for YunoHost](https://github.com/YunoHost-Apps/zerotier_ynh) has to be installed beforehand.
 
 ## Additional information
 
diff --git a/check_process b/check_process
index dd1c025..89023cf 100644
--- a/check_process
+++ b/check_process
@@ -5,28 +5,31 @@
 
 ;; Test complet
 	; Manifest
-		domain="domain.tld"	(DOMAIN)
-		path="/"	(PATH)
-		admin="john"	(USER)
-		language="fr"
-		is_public=1	(PUBLIC|public=1|private=0)
-		password="pass"
-		port="666"	(PORT)
+			domain="domain.tld"	(DOMAIN)
+			path="/"	(PATH)
+			admin="john"	(USER)
+			language="fr"
+			is_public=1	(PUBLIC|public=1|private=0)
+			password="pass"
+			port="666"	(PORT)
+	; pre-install
+			sudo yunohost app fetchlist
+			sudo yunohost app install zerotier
 	; Checks
-		pkg_linter=1
-		setup_sub_dir=0
-		setup_root=1
-		setup_nourl=0
-		setup_private=1
-		setup_public=1
-		upgrade=1
-		upgrade=1	from_commit=CommitHash
-		backup_restore=1
-		multi_instance=1
-		# This test is no longer necessary since the version 2.7 (PR: https://github.com/YunoHost/yunohost/pull/304), you can still do it if your app could be installed with this version.
-		# incorrect_path=1
-		port_already_use=0
-		change_url=1
+			pkg_linter=1
+			setup_sub_dir=0
+			setup_root=1
+			setup_nourl=0
+			setup_private=1
+			setup_public=1
+			upgrade=1
+			;upgrade=1	from_commit=CommitHash
+			backup_restore=1
+			multi_instance=0
+			# This test is no longer necessary since the version 2.7 (PR: https://github.com/YunoHost/yunohost/pull/304), you can still do it if your app could be installed with this version.
+			# incorrect_path=1
+			port_already_use=0
+			change_url=1
 ;;; Levels
 	# If the level 5 (Package linter) is forced to 1. Please add justifications here.
 	Level 5=auto
@@ -37,4 +40,3 @@ Notification=none
 	; commit=CommitHash
 		name=Name and date of the commit.
 		manifest_arg=domain=DOMAIN&path=PATH&admin=USER&language=fr&is_public=1&password=pass&port=666&
-
diff --git a/conf/start.sh b/conf/start.sh
deleted file mode 100644
index 43f8d7f..0000000
--- a/conf/start.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/bash
-
-pushd __FINALPATH__/src/
-  npm start
-popd
diff --git a/conf/systemd.service b/conf/systemd.service
index d2f3180..b5a4e27 100644
--- a/conf/systemd.service
+++ b/conf/systemd.service
@@ -4,11 +4,11 @@ After=network.target
 
 [Service]
 Type=simple
-User=root
-Group=root
-Environment="PATH=__ENV_PATH__"
-WorkingDirectory=__FINALPATH__/src/
-ExecStart=/bin/bash __FINALPATH__/src/start.sh >> /var/log/__APP__/__APP__.log 2>&1
+User=ztncui
+Group=ztncui
+Environment="PATH=__PATH__"
+WorkingDirectory=__FINAL_PATH__/src/
+ExecStart=__NODEJS_PATH__/npm start
 
 [Install]
 WantedBy=multi-user.target
diff --git a/manifest.json b/manifest.json
index b67c334..1c013be 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,45 +1,73 @@
 {
-    "name": "Zerotier UI",
-    "id": "ztncui",
-    "packaging_format": 1,
-    "description": {
-        "en": "A user interface for the ZeroTier network controller",
-        "fr": "Une interface utilisateur pour le contrôleur réseau ZeroTier"
-    },
-    "version": "0.5.8~ynh1",
-    "url": "https://key-networks.com/ztncui",
-    "license": "gpl",
-    "maintainer": {
-        "name": "tituspijean",
-        "email": "tituspijean@outlook.com"
-    },
-    "requirements": {
-        "yunohost": ">= 3.5"
-    },
-    "multi_instance": false,
-    "services": [
-        "zerotier-one"
-    ],
-    "arguments": {
-        "install" : [
-            {
-                "name": "domain",
-                "type": "domain",
-                "ask": {
-                    "en": "Choose a domain name for ztncui",
-                    "fr": "Choisissez un nom de domaine pour ztncui"
-                },
-                "example": "example.com"
-            },
-            {
-                "name": "is_public",
-                "type": "boolean",
-                "ask": {
-                    "en": "Is it a public application?",
-                    "fr": "Est-ce une application publique ?"
-                },
-                "default": false
-            }
-        ]
-    }
+	"name": "Zerotier UI",
+	"id": "ztncui",
+	"packaging_format": 1,
+	"description": {
+		"en": "ZeroTier network controller user interface",
+		"fr": "Interface utilisateur pour le contrôleur de réseau ZeroTier"
+	},
+	"version": "0.5.8~ynh1",
+	"url": "https://key-networks.com/ztncui",
+	"license": "GPL-3.0-only",
+	"maintainer": {
+		"name": "tituspijean",
+		"email": "tituspijean@outlook.com"
+	},
+	"requirements": {
+		"yunohost": ">= 3.7"
+	},
+	"services": [],
+	"multi_instance": false,
+	"arguments": {
+		"install": [
+			{
+				"name": "domain",
+				"type": "domain",
+				"ask": {
+					"en": "Choose a domain name for ztncui",
+					"fr": "Choisissez un nom de domaine pour ztncui"
+				},
+				"help": {
+					"en": "REMINDER: ztncui needs the ZeroTier app to be already installed.",
+					"fr": "RAPPEL: ztncui nécessite que l'app ZeroTier soit déjà installée."
+				},
+				"example": "zt.example.com"
+			},
+			{
+				"name": "is_public",
+				"type": "boolean",
+				"ask": {
+					"en": "Is it a public application?",
+					"fr": "Est-ce une application publique ?"
+				},
+				"help": {
+					"en": "Ztncui has its own login system, but setting it as private is advised.",
+					"fr": "Ztncui a son propre système de connexion, mais la rendre privée est conseillé."
+				},
+				"default": false
+			},
+			{
+				"name": "admin",
+				"type": "user",
+				"ask": {
+					"en": "Choose an admin user",
+					"fr": "Choisissez l’administrateur"
+				},
+				"example": "johndoe"
+			},
+			{
+				"name": "password",
+				"type": "password",
+				"ask": {
+					"en": "Set the administrator password",
+					"fr": "Définissez le mot de passe administrateur"
+				},
+				"help": {
+					"en": "It will always be asked by Ztncui, in addition to your YunoHost credentials if set to private.",
+					"fr": "Il sera toujours demandé par Ztncui, en plus des identifiants YunoHost si l'app est privée."
+				},
+				"example": "Choose a password"
+			}
+		]
+	}
 }
diff --git a/scripts/_common.sh b/scripts/_common.sh
index d5160da..f55d066 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -4,7 +4,10 @@
 # COMMON VARIABLES
 #=================================================
 
-nodejs_version=10
+nodejs_version=12
+
+# dependencies used by the app
+pkg_dependencies="g++"
 
 #=================================================
 # PERSONAL HELPERS
@@ -14,6 +17,21 @@ nodejs_version=10
 # EXPERIMENTAL HELPERS
 #=================================================
 
+#!/bin/bash
+
+# Execute a command as another user
+# usage: exec_as USER COMMAND [ARG ...]
+exec_as() {
+  local USER=$1
+  shift 1
+
+  if [[ $USER = $(whoami) ]]; then
+    eval "$@"
+  else
+    sudo PATH=$PATH -u "$USER" "$@"
+  fi
+}
+
 #=================================================
 # FUTURE OFFICIAL HELPERS
 #=================================================
diff --git a/scripts/install b/scripts/install
index eabc49f..21f9cbe 100644
--- a/scripts/install
+++ b/scripts/install
@@ -27,6 +27,8 @@ ynh_abort_if_errors
 domain=$YNH_APP_ARG_DOMAIN
 path_url="/" #$YNH_APP_ARG_PATH
 is_public=$YNH_APP_ARG_IS_PUBLIC
+admin=$YNH_APP_ARG_ADMIN
+password=$YNH_APP_ARG_PASSWORD
 
 ### If it's a multi-instance app, meaning it can be installed several times independently
 ### The id of the app as stated in the manifest is available as $YNH_APP_ID
@@ -53,9 +55,12 @@ app=$YNH_APP_INSTANCE_NAME
 ### The execution time is given for the duration since the previous call. So the weight should be applied to this previous call.
 ynh_script_progression --message="Validating installation parameters..." --time --weight=1
 
+# Testing if ZeroTier is installed
+yunohost app list | grep -q "id: zerotier" || ynh_die "ZeroTier is needed, but it is not installed. There is a package for that!"
+
 ### If the app uses nginx as web server (written in HTML/PHP in most cases), the final path should be "/var/www/$app".
 ### If the app provides an internal web server (or uses another application server such as uwsgi), the final path should be "/opt/yunohost/$app"
-final_path=/opt/key-networks/ztncui
+final_path=/opt/yunohost/$app
 test ! -e "$final_path" || ynh_die --message="This path already contains a folder"
 
 # Register (book) web path
@@ -105,6 +110,8 @@ ynh_script_progression --message="Installing dependencies..." --time --weight=1
 ###		- As well as the section "REINSTALL DEPENDENCIES" in the restore script
 ###		- And the section "UPGRADE DEPENDENCIES" in the upgrade script
 
+ynh_install_app_dependencies $pkg_dependencies
+
 ynh_install_nodejs --nodejs_version=$nodejs_version
 ynh_use_nodejs
 
@@ -137,7 +144,7 @@ ynh_add_nginx_config
 ynh_script_progression --message="Configuring system user..." --time --weight=1
 
 # Create a system user
-ynh_system_user_create --username=$app
+ynh_system_user_create $app $final_path
 
 #=================================================
 # SPECIFIC SETUP
@@ -146,8 +153,13 @@ ynh_system_user_create --username=$app
 #=================================================
 ynh_script_progression --message="Performing Node app installation..." --time --weight=1
 
+chown -R $app: $final_path
+
 pushd $final_path/src
-	npm install
+	exec_as $app $nodejs_path/npm --loglevel=error install node-gyp
+	exec_as $app $nodejs_path/npm --loglevel=error install
+	exec_as $app $nodejs_path/npm --loglevel=error install argon2-cli
+	exec_as $app $nodejs_path/npm --loglevel=error audit fix
 popd
 
 #=================================================
@@ -158,15 +170,19 @@ popd
 mkdir -p $final_path
 env_file=$final_path/src/.env
 touch $env_file
+chmod 600 $env_file
 
 echo "ZT_TOKEN=$(</var/lib/zerotier-one/authtoken.secret)" >> $env_file
+echo "ZT_ADDR=localhost:$(</var/lib/zerotier-one/zerotier-one.port)" >> $env_file
 echo "HTTP_PORT=$port" >> $env_file
 
-cp ../conf/start.sh $final_path/src/
-ynh_replace_string "__APP__" "$app" "$final_path/src/start.sh"
-ynh_replace_string "__FINALPATH__" "$final_path" "$final_path/src/start.sh"
+# Setup user credentials file
+hashedpassword=$(echo -n "$password" | $final_path/src/node_modules/.bin/argon2-cli -e)
+echo "{\"$admin\":{\"name\":\"$admin\",\"pass_set\":true,\"hash\":\"$hashedpassword\"}}" >> "$final_path/src/etc/passwd"
 
-cp $final_path/src/etc/default.passwd $final_path/src/etc/passwd
+# Store user settings
+ynh_app_setting_set --app=$app --key=admin --value=$admin
+ynh_app_setting_set --app=$app --key=hashedpassword --value=$hashedpassword
 
 #=================================================
 # LINK CERTIFICATES
@@ -175,8 +191,8 @@ cp $final_path/src/etc/default.passwd $final_path/src/etc/passwd
 # Even though one can stay in HTTP mode, the ztncui requires SSL certificates
 # let's use the ones of the domain
 pushd $final_path/src/etc/tls
-	ln -s /etc/yunohost/certs/$domain/key.pem privkey.pem
-	ln -s /etc/yunohost/certs/$domain/crt.pem fullchain.pem
+	cp /etc/yunohost/certs/$domain/key.pem privkey.pem
+	cp /etc/yunohost/certs/$domain/crt.pem fullchain.pem
 popd
 
 #=================================================
@@ -195,10 +211,13 @@ ynh_script_progression --message="Configuring a systemd service..." --time --wei
 ###		- As well as the section "RESTORE SYSTEMD" in the restore script
 ###		- And the section "SETUP SYSTEMD" in the upgrade script
 
+# Set the systemd service settings
+ynh_replace_string "__PATH__" "$PATH" "../conf/systemd.service"
+ynh_replace_string "__NODEJS_PATH__" "$nodejs_path" "../conf/systemd.service"
+ynh_replace_string "__FINAL_PATH__" "$final_path" "../conf/systemd.service"
+
 # Create a dedicated systemd config
 ynh_add_systemd_config
-ynh_replace_string "__ENV_PATH__" "$PATH" "/etc/systemd/system/$app.service"
-systemctl daemon-reload
 
 #=================================================
 # GENERIC FINALIZATION
@@ -270,13 +289,12 @@ ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$ap
 #=================================================
 # SETUP SSOWAT
 #=================================================
-ynh_script_progression --message="Configuring SSOwat..." --time --weight=1
+ynh_script_progression --message="Configuring SSOwat..."
 
 # Make app public if necessary
 if [ $is_public -eq 1 ]
 then
-	# unprotected_uris allows SSO credentials to be passed anyway.
-	ynh_app_setting_set --app=$app --key=unprotected_uris --value="/"
+	ynh_permission_update --permission "main" --add visitors
 fi
 
 #=================================================
diff --git a/scripts/remove b/scripts/remove
index b201fd3..9cf7ddf 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -33,11 +33,21 @@ then
 	yunohost service remove $app
 fi
 
+#=================================================
+# STOP AND REMOVE SERVICE
+#=================================================
+ynh_script_progression --message="Stopping and removing the systemd service..." --time --weight=1
+
+# Remove the dedicated systemd config
+ynh_remove_systemd_config
+
 #=================================================
 # REMOVE DEPENDENCIES
 #=================================================
 ynh_script_progression --message="Removing dependencies..." --time --weight=1
 
+# Remove metapackage and its dependencies
+ynh_remove_app_dependencies
 ynh_remove_nodejs
 
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 1957c55..f4c271a 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -20,6 +20,9 @@ domain=$(ynh_app_setting_get --app=$app --key=domain)
 path_url=$(ynh_app_setting_get --app=$app --key=path)
 is_public=$(ynh_app_setting_get --app=$app --key=is_public)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
+port=$(ynh_app_setting_get --app=$app --key=port)
+admin=$(ynh_app_setting_get --app=$app --key=admin)
+hashedpassword=$(ynh_app_setting_get --app=$app --key=hashedpassword)
 
 #=================================================
 # CHECK VERSION
@@ -38,15 +41,6 @@ upgrade_type=$(ynh_check_app_version_changed)
 #=================================================
 ynh_script_progression --message="Ensuring downward compatibility..." --time --weight=1
 
-# Fix is_public as a boolean value
-if [ "$is_public" = "Yes" ]; then
-	ynh_app_setting_set --app=$app --key=is_public --value=1
-	is_public=1
-elif [ "$is_public" = "No" ]; then
-	ynh_app_setting_set --app=$app --key=is_public --value=0
-	is_public=0
-fi
-
 # If db_name doesn't exist, create it
 if [ -z "$db_name" ]; then
 	db_name=$(ynh_sanitize_dbid --db_name=$app)
@@ -119,7 +113,10 @@ ynh_add_nginx_config
 #=================================================
 ynh_script_progression --message="Upgrading dependencies..." --time --weight=1
 
-#ynh_install_app_dependencies $pkg_dependencies
+ynh_install_app_dependencies $pkg_dependencies
+
+ynh_install_nodejs --nodejs_version=$nodejs_version
+ynh_use_nodejs
 
 #=================================================
 # CREATE DEDICATED USER
@@ -127,7 +124,7 @@ ynh_script_progression --message="Upgrading dependencies..." --time --weight=1
 ynh_script_progression --message="Making sure dedicated system user exists..." --time --weight=1
 
 # Create a dedicated user (if not existing)
-ynh_system_user_create --username=$app
+ynh_system_user_create $app $final_path
 
 #=================================================
 # SPECIFIC UPGRADE
@@ -136,8 +133,41 @@ ynh_system_user_create --username=$app
 #=================================================
 ynh_script_progression --message="Performing Node app installation..." --time --weight=1
 
+chown -R $app: $final_path
+
 pushd $final_path/src
-	npm install
+	exec_as $app $nodejs_path/npm --loglevel=error install node-gyp
+	exec_as $app $nodejs_path/npm --loglevel=error install
+	exec_as $app $nodejs_path/npm --loglevel=error install argon2-cli
+	exec_as $app $nodejs_path/npm --loglevel=error audit fix
+popd
+
+#=================================================
+# MODIFY A CONFIG FILE
+#=================================================
+
+# Setup env file
+mkdir -p $final_path
+env_file=$final_path/src/.env
+touch $env_file
+chmod 600 $env_file
+
+echo "ZT_TOKEN=$(</var/lib/zerotier-one/authtoken.secret)" >> $env_file
+echo "ZT_ADDR=localhost:$(</var/lib/zerotier-one/zerotier-one.port)" >> $env_file
+echo "HTTP_PORT=$port" >> $env_file
+
+# Setup user credentials file
+echo "{\"$admin\":{\"name\":\"$admin\",\"pass_set\":true,\"hash\":\"$hashedpassword\"}}" >> "$final_path/src/etc/passwd"
+
+#=================================================
+# LINK CERTIFICATES
+#=================================================
+
+# Even though one can stay in HTTP mode, the ztncui requires SSL certificates
+# let's use the ones of the domain
+pushd $final_path/src/etc/tls
+	cp /etc/yunohost/certs/$domain/key.pem privkey.pem
+	cp /etc/yunohost/certs/$domain/crt.pem fullchain.pem
 popd
 
 #=================================================
@@ -153,6 +183,11 @@ ynh_use_logrotate --non-append
 #=================================================
 ynh_script_progression --message="Upgrading systemd configuration..." --time --weight=1
 
+# Set the systemd service settings
+ynh_replace_string "__PATH__" "$PATH" "../conf/systemd.service"
+ynh_replace_string "__NODEJS_PATH__" "$nodejs_path" "../conf/systemd.service"
+ynh_replace_string "__FINAL_PATH__" "$final_path" "../conf/systemd.service"
+
 # Create a dedicated systemd config
 ynh_add_systemd_config
 
@@ -163,7 +198,7 @@ ynh_add_systemd_config
 #=================================================
 
 # Set permissions on app files
-chown -R root: $final_path
+chown -R $app: $final_path
 
 #=================================================
 # SETUP SSOWAT