diff --git a/scripts/upgrade b/scripts/upgrade
index abc9adc..97a6ad7 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -17,11 +17,15 @@ ynh_script_progression --message="Loading installation settings..." --time --wei
 app=$YNH_APP_INSTANCE_NAME
 
 domain=$(ynh_app_setting_get --app=$app --key=domain)
+port=$(ynh_app_setting_get --app=$app --key=port)
 path_url=$(ynh_app_setting_get --app=$app --key=path)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 db_name=$(ynh_app_setting_get --app=$app --key=db_name)
+db_user=$db_name
+db_pwd=$(ynh_app_setting_get --app=$app --key=mysqlpwd)
 
 # APIS TOKENS AND USER AGENT (USEFUL TO RESTORE CONFIG FILE)
+user_agent=$(ynh_app_setting_get --app=$app --key=user_agent)
 osr_token=$(ynh_app_setting_get --app=$app --key=osr_token)
 mapbox_token=$(ynh_app_setting_get --app=$app --key=mapbox_token)
 mapzen_token=$(ynh_app_setting_get --app=$app --key=mapzen_token)
@@ -67,6 +71,9 @@ then
 
 	# Download, check integrity, uncompress and patch the source from app.src
 	ynh_setup_source --dest_dir="$final_path"
+
+	# Remove docs, they are not needed and take a lot of space
+	rm -rf "$final_path/docs"
 fi
 
 #=================================================
@@ -91,6 +98,9 @@ ynh_script_progression --message="Installing NodeJS..." --weight=15
 
 ynh_install_nodejs --nodejs_version=$nodejs_version
 
+# Install Yarn
+ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ stable main" --package="yarn" --key="https://dl.yarnpkg.com/debian/pubkey.gpg"
+
 #=================================================
 # CREATE DEDICATED USER
 #=================================================
@@ -110,8 +120,8 @@ chown -R "$app":"$app" $final_path
 
 pushd "$final_path"
 	ynh_use_nodejs
-	sudo -u $app env $ynh_node_load_PATH yarn install --loglevel warn
-	sudo -u $app env $ynh_node_load_PATH yarn build --loglevel warn
+	sudo -u $app env $ynh_node_load_PATH yarn install
+	sudo -u $app env $ynh_node_load_PATH yarn build
 popd
 
 #=================================================
@@ -157,7 +167,7 @@ yunohost service add $app --description="Collaborative maps and routing with a s
 #=================================================
 ynh_script_progression --message="Starting a systemd service..." --time --weight=1
 
-ynh_systemd_action --service_name=$app --action="start" --log_path="systemd" --line_match="server started"
+ynh_systemd_action --service_name=$app --action="start" --log_path="systemd" --line_match="Server started"
 
 #=================================================
 # RELOAD NGINX