diff --git a/conf/mastodon-sidekiq.service b/conf/mastodon-sidekiq.service
index c0a24c8..34074ed 100644
--- a/conf/mastodon-sidekiq.service
+++ b/conf/mastodon-sidekiq.service
@@ -7,8 +7,8 @@
  User=mastodon
  WorkingDirectory=/opt/mastodon/live
  Environment="RAILS_ENV=production"
- Environment="DB_POOL=5"
- ExecStart=/opt/mastodon/.rbenv/shims/bundle exec sidekiq -c 5 -q default -q mailers -q pull -q push
+ Environment="DB_POOL=20"
+ ExecStart=/opt/mastodon/.rbenv/shims/bundle exec sidekiq -c 20 -q default -q mailers -q pull -q push
  TimeoutSec=15
  Restart=always
  StandardError=syslog
diff --git a/conf/nginx.conf b/conf/nginx.conf
index d05cdcb..780c462 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -1,42 +1,41 @@
- location __PATH__ {
-  alias __FINALPATH__/live/public;
+location __PATH__ {
+	# alias __FINALPATH__/live/public;
 
-  if ($scheme = http) {
-    rewrite ^ https://$server_name$request_uri? permanent;
-  }
+	if ($scheme = http) {
+	rewrite ^ https://$server_name$request_uri? permanent;
+	}
 
+	try_files $uri @proxy;
 
-  try_files $uri @proxy;
+	#--PRIVATE--# Include SSOWAT user panel.
+	#--PRIVATE--include conf.d/yunohost_panel.conf.inc;
+}
 
-  # Include SSOWAT user panel.
-  include conf.d/yunohost_panel.conf.inc;
- }
+location @proxy {
+	proxy_set_header Host $host;
+	proxy_set_header X-Real-IP $remote_addr;
+	proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+	proxy_set_header X-Forwarded-Proto https;
+	proxy_pass_header Server;
+	proxy_pass http://127.0.0.1:3000;
+	proxy_buffering off;
+	proxy_redirect off;
+	proxy_http_version 1.1;
+	proxy_set_header Upgrade $http_upgrade;
+	proxy_set_header Connection "upgrade";
+	tcp_nodelay on;
+}
 
- location @proxy {
-  proxy_set_header Host $host;
-  proxy_set_header X-Real-IP $remote_addr;
-  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-  proxy_set_header X-Forwarded-Proto https;
-  proxy_pass_header Server;
-  proxy_pass http://127.0.0.1:3000;
-  proxy_buffering off;
-  proxy_redirect off;
-  proxy_http_version 1.1;
-  proxy_set_header Upgrade $http_upgrade;
-  proxy_set_header Connection "upgrade";
-  tcp_nodelay on;
- }
-
- location __PATH__/api/v1/streaming {
-  proxy_set_header Host $host;
-  proxy_set_header X-Real-IP $remote_addr;
-  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-  proxy_set_header X-Forwarded-Proto https;
-  proxy_pass http://127.0.0.1:4000;
-  proxy_buffering off;
-  proxy_redirect off;
-  proxy_http_version 1.1;
-  proxy_set_header Upgrade $http_upgrade;
-  proxy_set_header Connection "upgrade";
-  tcp_nodelay on;
+location /api/v1/streaming {
+	proxy_set_header Host $host;
+	proxy_set_header X-Real-IP $remote_addr;
+	proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+	proxy_set_header X-Forwarded-Proto https;
+	proxy_pass http://127.0.0.1:4000;
+	proxy_buffering off;
+	proxy_redirect off;
+	proxy_http_version 1.1;
+	proxy_set_header Upgrade $http_upgrade;
+	proxy_set_header Connection "upgrade";
+	tcp_nodelay on;
 }
\ No newline at end of file
diff --git a/scripts/.fonctions b/scripts/.fonctions
index 4557512..7d9c54d 100644
--- a/scripts/.fonctions
+++ b/scripts/.fonctions
@@ -135,18 +135,16 @@ SECURE_REMOVE () {      # Deleting a folder with variable verification
 	fi
 }
 
-REMOVE_BDD () {	# Delete database and users
-	# $1 = Database name
-	# Uses '$app' as user name and database
-	db_user=$1
-	if mysqlshow -u root -p$(sudo cat $MYSQL_ROOT_PWD_FILE) | grep -q "^| $db_user"; then
-		echo "Delete db"
-		ynh_mysql_drop_db $db_user
-		ynh_mysql_drop_user $db_user
-	fi
+# Create a db without password
+#
+# usage: ynh_mysql_create_user user
+# | arg: user - the user name to create
+ynh_psql_create_db_without_password() {
+	db=$1
+    sudo su -c "psql" postgres <<< \
+    "CREATE USER $db CREATEDB;"
 }
 
-
 # Create a user
 #
 # usage: ynh_mysql_create_user user pwd [host]
diff --git a/scripts/backup b/scripts/backup
new file mode 100644
index 0000000..2ef6b86
--- /dev/null
+++ b/scripts/backup
@@ -0,0 +1,30 @@
+#!/bin/bash
+
+# Exit on command errors and treat unset variables as an error
+set -eu
+
+# Get multi-instances specific variables
+app=$YNH_APP_INSTANCE_NAME
+
+# Source app helpers
+source /usr/share/yunohost/helpers
+
+# Retrieve app settings
+domain=$(ynh_app_setting_get "$app" domain)
+
+# Copy the app files
+final_path="/opt/${app}"
+ynh_backup "$final_path" "sources" 1
+
+# Copy the nginx conf files
+ynh_backup "/etc/nginx/conf.d/${domain}.d/${app}.conf" "nginx.conf"
+ynh_backup "/etc/cron.d/${app}.conf" "cron.conf"
+ynh_backup "/etc/systemd/system/mastodon-web.service" "systemd_web.service"
+ynh_backup "/etc/systemd/system/mastodon-sidekiq.service" "systemd_sidekiq.service"
+ynh_backup "/etc/systemd/system/mastodon-streaming.service" "systemd_streaming.service"
+
+# Backup db
+sudo su - postgres <<COMMANDS
+pg_dump mastodon_production > /home/backup/mastodon_db.sql
+COMMANDS
+ynh_backup "/home/backup/mastodon_db.sql" "mastodon_db.sql"
\ No newline at end of file
diff --git a/scripts/install b/scripts/install
index f3c9ed4..ad88c10 100644
--- a/scripts/install
+++ b/scripts/install
@@ -9,7 +9,7 @@ source /usr/share/yunohost/helpers # Source app helpers
 CLEAN_SETUP () {
 	# Clean installation residues that are not supported by the remove script.
 	# Clean hosts
-	sudo sed -i '/#MASTODON/d' /etc/hosts
+	echo ""
 }
 TRAP_ON	# Active trap to stop the script if an error is detected.
 
@@ -17,7 +17,6 @@ domain=$YNH_APP_ARG_DOMAIN
 path=$YNH_APP_ARG_PATH
 admin_mastodon=$YNH_APP_ARG_ADMIN
 is_public=$YNH_APP_ARG_IS_PUBLIC
-#language=$YNH_APP_ARG_LANGUAGE
 
 app=$YNH_APP_INSTANCE_NAME
 
@@ -66,19 +65,15 @@ curl -sL https://deb.nodesource.com/setup_4.x | sudo bash -
 sudo apt-get -y install nodejs
 sudo npm install -g yarn
 
-## Install postgresql database
+# Create DB without password
 sudo systemctl restart postgresql
-dbname=$app
-dbuser=$app
-# Generate random password
-dbpass=$(ynh_string_random)
-ynh_psql_create_db "$dbname" "$dbuser" "$dbpass"
+ynh_psql_create_db_without_password "$app"
 
 # Download all Ruby source
 sudo git clone https://github.com/rbenv/rbenv.git $final_path/.rbenv
 sudo git clone https://github.com/rbenv/ruby-build.git $final_path/.rbenv/plugins/ruby-build
 sudo git clone https://github.com/tootsuite/mastodon.git $final_path/live
-sudo git clone git://github.com/dcarley/rbenv-sudo.git $final_path/.rbenv/plugins/rbenv-sudo
+
 sudo chown -R $app: "${final_path}"
 
 # Install de rbenv
@@ -87,7 +82,6 @@ pushd ~/.rbenv
 src/configure && make -C src
 echo 'export PATH="/opt/mastodon/.rbenv/bin:/opt/mastodon/live/bin:$PATH"' >> ~/.bashrc
 echo 'eval "\$(rbenv init -)"' >> ~/.bashrc
-echo "alias su='env PATH=\$PATH'" >> ~/.bashrc
 COMMANDS
 
 # Install ruby-build
@@ -110,11 +104,12 @@ MCOMMANDS
 # Adjust Mastodon config
 pushd $final_path/live/
 sudo cp -a .env.production.sample .env.production
-sudo sed -i "s@REDIS_HOST=localhost@REDIS_HOST=127.0.0.1@g" "${final_path}/live/.env.production"
+sudo sed -i "s@REDIS_HOST=redis@REDIS_HOST=127.0.0.1@g" "${final_path}/live/.env.production"
 sudo sed -i "s@DB_HOST=db@DB_HOST=/var/run/postgresql@g" "${final_path}/live/.env.production"
-sudo sed -i "s@DB_USER=mastodon@DB_USER=${dbuser}@g" "${final_path}/live/.env.production"
-sudo sed -i "s@DB_NAME=mastodon@DB_NAME=${dbname}@g" "${final_path}/live/.env.production"
-sudo sed -i "s@LOCAL_DOMAIN=domainedevotreinstance.tld@LOCAL_DOMAIN=${domain}@g" "${final_path}/live/.env.production"
+sudo sed -i "s@DB_USER=postgres@DB_USER=${app}@g" "${final_path}/live/.env.production"
+sudo sed -i "s@DB_NAME=postgres@DB_NAME=${app}_production@g" "${final_path}/live/.env.production"
+# sudo sed -i "s@DB_PASS=@DB_PASS=${dbpass}@g" "${final_path}/live/.env.production"
+sudo sed -i "s@LOCAL_DOMAIN=example.com@LOCAL_DOMAIN=${domain}@g" "${final_path}/live/.env.production"
 
 sudo sed -i "s@PAPERCLIP_SECRET=@PAPERCLIP_SECRET=$(head -n32 /dev/urandom | tr -dc -d 'A-Za-z0-9' | head -c32)@g" "${final_path}/live/.env.production"
 sudo sed -i "s@SECRET_KEY_BASE=@SECRET_KEY_BASE=$(head -n32 /dev/urandom | tr -dc -d 'A-Za-z0-9' | head -c32)@g" "${final_path}/live/.env.production"
@@ -125,12 +120,17 @@ sudo sed -i 's,SMTP_FROM_ADDRESS=notifications@example.com,SMTP_FROM_ADDRESS='${
 
 # Create database
 # Preconfig CSS & JS
+# Create admin user
+# Create confirm email
 sudo su - $app <<ENDCOMMANDS
 pushd ~/live
 RAILS_ENV=production bin/bundle exec rails db:setup
 RAILS_ENV=production bin/bundle exec rails assets:precompile
 ENDCOMMANDS
 
+# RAILS_ENV=production bin/bundle exec rails mastodon:make_admin USERNAME=$admin_mastodon
+# RAILS_ENV=production bin/bundle exec rails mastodon:confirm_email USER_EMAIL=$admin_mastodon@$domain
+
 # Add Services
 pushd /var/cache/yunohost/from_file/mastodon_ynh-master/scripts
 
@@ -142,10 +142,9 @@ sudo cp ../conf/mastodon-streaming.service /etc/systemd/system/mastodon-streamin
 sudo chown root: /etc/systemd/system/mastodon-streaming.service
 
 sudo systemctl enable /etc/systemd/system/mastodon-*.service
-sudo systemctl daemon-reload
-sudo systemctl start mastodon-web.service mastodon-sidekiq.service mastodon-streaming.service
+# sudo systemctl start mastodon-web.service mastodon-sidekiq.service mastodon-streaming.service
 # # debug
-sudo systemctl status mastodon-web.service mastodon-sidekiq.service mastodon-streaming.service
+# sudo systemctl status mastodon-web.service mastodon-sidekiq.service mastodon-streaming.service
 
 # Add service YunoHost
 sudo yunohost service add mastodon-web
@@ -159,7 +158,7 @@ sudo sed -i "s@__FINALPATH__@$final_path@g" /etc/nginx/conf.d/$domain.d/$app.con
 
 # Install crontab
 sudo cp ../conf/crontab_mastodon /etc/cron.d/$app
-sudo sed -i "s@__AP__@$app@g" /etc/cron.d/$app
+sudo sed -i "s@__APP__@$app@g" /etc/cron.d/$app
 
 # Private or not
 if [ "$is_public" = "Yes" ];
@@ -177,10 +176,7 @@ fi
 # Reload SSOwat configuration
 sudo yunohost app ssowatconf
 
-# Reload Nginx and regenerate SSOwat conf
+# Reload Nginx
 sudo systemctl reload nginx || true
 # debug
 sudo systemctl status nginx
-
-# Nettoyer hosts
-sudo sed -i '/#MASTODON/d' /etc/hosts
diff --git a/scripts/remove b/scripts/remove
index f83b286..75e56ba 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -13,6 +13,30 @@ app=$YNH_APP_INSTANCE_NAME
 # Retrieve app settings
 domain=$(ynh_app_setting_get "$app" domain)
 
+# Stop mastodon-web
+if [ -e "/etc/systemd/system/mastodon-web.service" ]; then
+	echo "Delete systemd script"
+	sudo systemctl stop mastodon-web.service
+	sudo rm "/etc/systemd/system/mastodon-web.service"
+	sudo systemctl disable mastodon-web.service
+fi
+
+# Stop mastodon-sidekiq
+if [ -e "/etc/systemd/system/mastodon-sidekiq.service" ]; then
+	echo "Delete systemd script"
+	sudo systemctl stop mastodon-sidekiq.service
+	sudo rm "/etc/systemd/system/mastodon-sidekiq.service"
+	sudo systemctl disable mastodon-sidekiq.service
+fi
+
+# Stop mastodon-sidekiq
+if [ -e "/etc/systemd/system/mastodon-streaming.service" ]; then
+	echo "Delete systemd script"
+	sudo systemctl stop mastodon-sidekiq.streaming
+	sudo rm "/etc/systemd/system/mastodon-streaming.service"
+	sudo systemctl disable mastodon-streaming.service
+fi
+
 # Delete service on Yunohost monitoring
 if sudo yunohost service status | grep -q mastodon-web
 then
@@ -34,33 +58,8 @@ then
 	sudo yunohost service remove mastodon-streaming
 fi
 
-# Stop mastodon-web
-if [ -e "/etc/systemd/system/mastodon-web.service" ]; then
-	echo "Delete systemd script"
-	sudo service mastodon-web.service stop
-	sudo rm "/etc/systemd/system/mastodon-web.service"
-	sudo systemctl disable mastodon-web.service
-fi
-
-# Stop mastodon-sidekiq
-if [ -e "/etc/systemd/system/mastodon-sidekiq.service" ]; then
-	echo "Delete systemd script"
-	sudo service mastodon-sidekiq.service stop
-	sudo rm "/etc/systemd/system/mastodon-sidekiq.service"
-	sudo systemctl disable mastodon-sidekiq.service
-fi
-
-# Stop mastodon-sidekiq
-if [ -e "/etc/systemd/system/mastodon-streaming.service" ]; then
-	echo "Delete systemd script"
-	sudo service mastodon-sidekiq.streaming stop
-	sudo rm "/etc/systemd/system/mastodon-streaming.service"
-	sudo systemctl disable mastodon-streaming.service
-fi
-
 # delete postgresql database & user
-ynh_psql_drop_db $app
-ynh_psql_drop_user $app
+ynh_psql_drop_db "${app}_production"
 
 # Remove Debian package
 #sudo apt-get remove --purge -y imagemagick ffmpeg libpq-dev libxml2-dev libxslt1-dev file curl git
@@ -75,12 +74,13 @@ ynh_psql_drop_user $app
 SECURE_REMOVE '/opt/$app'
 [[ -n $domain ]] && sudo rm -f "/etc/nginx/conf.d/${domain}.d/${app}.conf"
 
-# Suppression d'un lien symbolique
-rm /usr/bin/ruby
+# Delete nginx configuration
+REMOVE_NGINX_CONF
 
-REMOVE_NGINX_CONF	# Suppression de la configuration nginx
-
-SECURE_REMOVE '/var/log/$app/'	# Suppression des log
+# Delete log
+SECURE_REMOVE '/var/log/$app/'
+# Delete cronlog
+SECURE_REMOVE '/etc/cron.d/$app'
 
 # Remove user
 sudo userdel -f $app
diff --git a/scripts/restore b/scripts/restore
new file mode 100644
index 0000000..f1c80ee
--- /dev/null
+++ b/scripts/restore
@@ -0,0 +1,83 @@
+#!/bin/bash
+# This restore script is adapted to Yunohost >=2.4
+
+# Exit on command errors and treat unset variables as an error
+set -eu
+
+# The parameter $app is the id of the app instance ex: ynhexample__2
+app=$YNH_APP_INSTANCE_NAME
+
+# Source app helpers
+source /usr/share/yunohost/helpers
+
+# Get old parameter of the app
+domain=$(ynh_app_setting_get $app domain)
+path=$(ynh_app_setting_get $app path)
+is_public=$(ynh_app_setting_get $app is_public)
+
+# Check domain/path availability
+sudo yunohost app checkurl "${domain}${path}" -a "$app" \
+    || ynh_die "Path not available: ${domain}${path}"
+
+# Check $final_path
+final_path="/opt/${app}"
+if [ -d $final_path ]; then
+	ynh_die "There is already a directory: $final_path"
+fi
+
+# Check configuration files nginx
+nginx_conf="/etc/nginx/conf.d/${domain}.d/${app}.conf"
+if [ -f $nginx_conf ]; then
+	ynh_die "The NGINX configuration already exists at '${nginx_conf}'. 
+	You should safely delete it before restoring this app."
+
+# Check configuration files php-fpm
+crontab_conf="/etc/cron.d/${app}"
+if [ -f $crontab_conf ]; then 
+	ynh_die "The CRONTAB configuration already exists at '${crontab_conf}'. 
+	You should safely delete it before restoring this app."
+fi
+
+# Restore services
+web_systemd="/etc/systemd/system/${app}-web.service"
+if [ -f "${web_systemd}" ]; then
+	ynh_die "The MASTODON WEB configuration already exists at '${web_systemd}'. 
+	You should safely delete it before restoring this app."
+fi
+sidekiq_systemd="/etc/systemd/system/${app}-sidekiq.service"
+if [ -f "${sidekiq_systemd}" ]; then
+	ynh_die "The MASTODON SIDEKIQ configuration already exists at '${sidekiq_systemd}'. 
+	You should safely delete it before restoring this app."
+fi
+streaming_systemd="/etc/systemd/system/${app}-streaming.service"
+if [ -f "${streaming_systemd}" ]; then
+	ynh_die "The MASTODON STREAMING configuration already exists at '${streaming_systemd}'. 
+	You should safely delete it before restoring this app."
+fi
+
+ # Restore sources & data
+sudo cp -a ./sources "$final_path"
+
+# Set permissions
+sudo chown -R $app: "$final_path"
+
+# Restore db
+ynh_psql_create_db_without_password "$app"
+sudo su - postgres <<COMMANDS
+pg_dump mastodon_production < ./mastodon_db.sql
+COMMANDS
+
+# Restore Mastodon
+sudo su - $app <<RCOMMANDS
+cd ~/live
+RAILS_ENV=production bin/bundle exec rails db:migrate
+RAILS_ENV=production bin/bundle exec rails assets:precompile
+RCOMMANDS
+
+# Restore nginx configuration files
+sudo cp -a ./nginx.conf   "$nginx_conf"
+# Restore crontab
+sudo cp -a ./cron.conf "$crontab_conf"
+
+# Reload services
+sudo systemctl reload nginx
\ No newline at end of file
diff --git a/scripts/upgrade b/scripts/upgrade
new file mode 100644
index 0000000..0260ee1
--- /dev/null
+++ b/scripts/upgrade
@@ -0,0 +1,54 @@
+#!/bin/bash
+
+# Exit on command errors and treat unset variables as an error
+set -eu
+
+source .fonctions	# Loads the generic functions usually used in the script
+source /usr/share/yunohost/helpers # Source YunoHost helpers
+
+# See comments in install script
+app=$YNH_APP_INSTANCE_NAME
+
+# Retrieve app settings
+domain=$(ynh_app_setting_get "$app" domain)
+path=$(ynh_app_setting_get "$app" path)
+admin=$(ynh_app_setting_get "$app" admin)
+is_public=$(ynh_app_setting_get "$app" is_public)
+
+CHECK_PATH	# Checks and corrects the syntax of the path.
+
+# Check if admin is not null
+if [[ "$admin" = "" || "$is_public" = "" || "$language" = "" ]]; then
+    echo "Unable to upgrade, please contact support"
+    ynh_die
+fi
+
+final_path=/opt/$app
+
+db_name=$app
+
+# Modify Nginx configuration file and copy it to Nginx conf directory
+sudo sed -i "s@__PATH__@$app@g" ../conf/nginx.conf*
+sudo sed -i "s@__FINALPATH__@$final_path/@g" ../conf/nginx.conf*
+
+# Update Mastodon
+sudo su - $app <<COMMANDS
+pushd ~/live
+git pull
+RAILS_ENV=production bin/bundle exec rails db:migrate
+RAILS_ENV=production bin/bundle exec rails assets:precompile
+COMMANDS
+
+# If app is public, add url to SSOWat conf as skipped_uris
+if [ $is_public = "Yes" ];
+then
+	ynh_app_setting_set "$app" unprotected_uris "/"
+	sudo cp ../conf/nginx.conf /etc/nginx/conf.d/$domain.d/$app.conf
+else
+	sudo cp ../conf/nginx.conf /etc/nginx/conf.d/$domain.d/$app.conf
+fi
+
+# Reload Nginx
+sudo systemctl reload nginx
+# Reload Mastodon
+sudo systemctl restart mastodon-*.service
\ No newline at end of file