diff --git a/scripts/backup b/scripts/backup
index 9389cc9..a90fb55 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -1,11 +1,24 @@
 #!/bin/bash
 
+#=================================================
+# GENERIC START
 #=================================================
 # IMPORT GENERIC HELPERS
 #=================================================
 
+# Keep this path for calling _common.sh inside the execution's context of backup and restore scripts
+source ../settings/scripts/_common.sh
 source /usr/share/yunohost/helpers
 
+#=================================================
+# MANAGE SCRIPT FAILURE
+#=================================================
+
+ynh_clean_setup () {
+	### Remove this function if there's nothing to clean before calling the remove script.
+	true
+}
+# Exit if an error occurs during the execution of the script
 ynh_abort_if_errors
 
 #=================================================
@@ -23,17 +36,23 @@ domain=$(ynh_app_setting_get $app domain)
 # BACKUP THE APP MAIN DIR
 #=================================================
 
-ynh_backup "$final_path"
+ynh_backup --src_path="$final_path"
 
 #=================================================
 # BACKUP THE CONFIGURATION
 #=================================================
 
-ynh_backup "/etc/systemd/system/$app.service" "conf/service"
-ynh_backup "/etc/nginx/conf.d/$domain.d/$app.conf" "conf/nginx"
+ynh_backup --src_path="/etc/systemd/system/$app.service" "conf/service"
+ynh_backup --src_path="/etc/nginx/conf.d/$domain.d/$app.conf" "conf/nginx"
 
 #=================================================
 # BACKUP THE MONGODB DATABASE
 #=================================================
 
-mongodump -o "./dump"
+ynh_mongo_dump_db
+
+#=================================================
+# END OF SCRIPT
+#=================================================
+
+ynh_print_info --message="Backup script completed for $app. (YunoHost will then actually copy those files to the archive)."
diff --git a/scripts/install b/scripts/install
index 11a1c2e..c7d900b 100644
--- a/scripts/install
+++ b/scripts/install
@@ -116,18 +116,13 @@ ynh_add_nginx_config
 #=================================================
 # SPECIFIC SETUP
 #==============================================
-# INSTALL HEDGEDOC
+# INSTALL ROCKETCHAT
 #==============================================
-ynh_script_progression --message="Building $app... (this will take some time and resources!)" --weight=240
+ynh_script_progression --message="Building $app... (this will take some time and resources!)" --weight=20
 
 pushd $final_path/programs/server
  	ynh_use_nodejs
- 	#npm install -g inherits n
  	ynh_exec_as $app env $ynh_node_load_PATH npm install
-
-	#export MONGO_URL='mongodb://$db_user:$db_pwdd@host:27017/$db_name'
-	#export ROOT_URL='http://$domain'
-	#export MAIL_URL='smtp://localhost:25'
 popd
 
 #=================================================
@@ -159,7 +154,6 @@ ynh_script_progression --message="Starting a systemd service..." --weight=2
 
 # Start a systemd service
 ynh_systemd_action --service_name=$app --action=start --log_path=systemd #--line_match="HTTP Server listening"
-
 ynh_systemd_action --service_name=mongod --action=restart --log_path=systemd 
 
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 5f36e21..2ebcc2d 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -84,6 +84,14 @@ ynh_script_progression --message="Stopping a systemd service..." --time --weight
 
 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..." --time --weight=1
+
+# Create a dedicated user (if not existing)
+ynh_system_user_create --username=$app --home_dir="$final_path"
+
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
@@ -96,87 +104,51 @@ then
 	ynh_setup_source --dest_dir="$final_path"
 fi
 
+chmod 750 "$final_path"
+chmod -R o-rwx "$final_path"
+chown -R $app:$app "$final_path"
+
 #=================================================
 # NGINX CONFIGURATION
 #=================================================
-ynh_script_progression --message="Upgrading NGINX web server configuration..." --time --weight=1
+ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=1
 
 # Create a dedicated NGINX config
 ynh_add_nginx_config
 
+#==============================================
+# INSTALL ROCKETCHAT
+#==============================================
+ynh_script_progression --message="Building $app... (this will take some time and resources!)" --weight=20
+
+pushd $final_path/programs/server
+ 	ynh_use_nodejs
+ 	ynh_exec_as $app env $ynh_node_load_PATH npm install
+popd
+
 #=================================================
 # UPGRADE DEPENDENCIES
 #=================================================
-ynh_script_progression --message="Upgrading dependencies..." --time --weight=1
+ynh_script_progression --message="Upgrading dependencies..." --weight=1
 
 ynh_install_app_dependencies $pkg_dependencies
 
-#=================================================
-# CREATE DEDICATED USER
-#=================================================
-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=$app
-
-#=================================================
-# PHP-FPM CONFIGURATION
-#=================================================
-ynh_script_progression --message="Upgrading PHP-FPM configuration..." --time --weight=1
-
-# Create a dedicated PHP-FPM config
-ynh_add_fpm_config
-
-#=================================================
-# SPECIFIC UPGRADE
-#=================================================
-# ...
-#=================================================
-
 #=================================================
 # SETUP SYSTEMD
 #=================================================
-ynh_script_progression --message="Upgrading systemd configuration..." --time --weight=1
+ynh_script_progression --message="Upgrading systemd configuration..." --weight=1
+
+ynh_replace_string --match_string="__ENV_PATH__" --replace_string="$PATH" --target_file="../conf/systemd.service"
 
 # Create a dedicated systemd config
 ynh_add_systemd_config
 
-#=================================================
-# MODIFY A CONFIG FILE
-#=================================================
-
-### Verify the checksum of a file, stored by `ynh_store_file_checksum` in the install script.
-### And create a backup of this file if the checksum is different. So the file will be backed up if the admin had modified it.
-ynh_backup_if_checksum_is_different --file="$final_path/CONFIG_FILE"
-
-ynh_replace_string --match_string="match_string" --replace_string="replace_string" --target_file="$final_path/CONFIG_FILE"
-
-# Recalculate and store the checksum of the file for the next upgrade.
-ynh_store_file_checksum --file="$final_path/CONFIG_FILE"
-
-#=================================================
-# GENERIC FINALIZATION
-#=================================================
-# SECURE FILES AND DIRECTORIES
-#=================================================
-
-# Set permissions on app files
-chown -R root: $final_path
-
-#=================================================
-# SETUP LOGROTATE
-#=================================================
-ynh_script_progression --message="Upgrading logrotate configuration..." --time --weight=1
-
-# Use logrotate to manage app-specific logfile(s)
-ynh_use_logrotate --non-append
-
 #=================================================
 # INTEGRATE SERVICE IN YUNOHOST
 #=================================================
 ynh_script_progression --message="Integrating service in YunoHost..." --time --weight=1
 
-yunohost service add $app --description="A short description of the app" --log="/var/log/$app/$app.log"
+yunohost service add $app --description="Team collaboration communication platform" --log="/var/log/$app/$app.log"
 
 #=================================================
 # START SYSTEMD SERVICE
@@ -185,6 +157,8 @@ ynh_script_progression --message="Starting a systemd service..." --time --weight
 
 ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/$app.log"
 
+ynh_systemd_action --service_name=mongod --action=restart --log_path=systemd 
+
 #=================================================
 # UPGRADE FAIL2BAN
 #=================================================