diff --git a/scripts/upgrade b/scripts/upgrade
index a6b3f17..ec28167 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -9,52 +9,8 @@
 source _common.sh
 source /usr/share/yunohost/helpers
 
-# Settings are automatically loaded as bash variables
-# in every app script context, therefore typically these will exist:
-# - $domain
-# - $path
-# - $language
-# - $install_dir
-# - $port
-# ...
-
-# In the context of upgrade,
-# - resources are automatically provisioned / updated / deleted (depending on existing resources)
-# - a safety backup is automatically created by the core and will be restored if the upgrade fails
-
-### This helper will compare the version of the currently installed app and the version of the upstream package.
-### $upgrade_type can have 2 different values
-### - UPGRADE_APP if the upstream app version has changed
-### - UPGRADE_PACKAGE if only the YunoHost package has changed
-### ynh_check_app_version_changed will stop the upgrade if the app is up to date.
-### UPGRADE_APP should be used to upgrade the core app only if there's an upgrade to do.
 upgrade_type=$(ynh_check_app_version_changed)
 
-#=================================================
-# STANDARD UPGRADE STEPS
-#=================================================
-# ENSURE DOWNWARD COMPATIBILITY
-#=================================================
-#ynh_script_progression --message="Ensuring downward compatibility..." --weight=1
-
-#
-# N.B. : the followings setting migrations snippets are provided as *EXAMPLES*
-# of what you may want to do in some cases (e.g. a setting was not defined on
-# some legacy installs and you therefore want to initiaze stuff during upgrade)
-#
-
-# If db_name doesn't exist, create it
-#if [ -z "$db_name" ]; then
-#	db_name=$(ynh_sanitize_dbid --db_name=$app)
-#	ynh_app_setting_set --app=$app --key=db_name --value=$db_name
-#fi
-
-# If install_dir doesn't exist, create it
-#if [ -z "$install_dir" ]; then
-#	install_dir=/var/www/$app
-#	ynh_app_setting_set --app=$app --key=install_dir --value=$install_dir
-#fi
-
 #=================================================
 # STOP SYSTEMD SERVICE
 #=================================================
@@ -67,38 +23,55 @@ ynh_systemd_action --service_name=$app --action="stop" --log_path="/var/log/$app
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
+ynh_script_progression --message="Setting up 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="$install_dir"
-fi
-
-# $install_dir will automatically be initialized with some decent 
-# permission by default ... however, you may need to recursively reapply
-# ownership to all files such as after the ynh_setup_source step
+chmod 750 "$install_dir"
+chmod -R o-rwx "$install_dir"
 chown -R $app:www-data "$install_dir"
 
 #=================================================
-# REAPPLY SYSTEM CONFIGURATIONS
+# BUILD APP
 #=================================================
-ynh_script_progression --message="Upgrading system configurations related to $app..." --weight=1
+ynh_script_progression --message="Building app..." --weight=30
 
-# This should be a literal copypasta of what happened in the install's "System configuration" section
+pushd $install_dir
+    ynh_use_nodejs
+	ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH yarn install --network-timeout=30000
+	ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH yarn run build
+#ynh_exec_warn_less yarn start
+popd
 
-ynh_add_fpm_config
+chmod 750 "$install_dir"
+chmod -R o-rwx "$install_dir"
+chown -R $app:$app "$install_dir"
 
-ynh_add_nginx_config
+#=================================================
+# SETUP SYSTEMD
+#=================================================
+ynh_script_progression --message="Configuring a systemd service..."
 
+# Create a dedicated systemd config
 ynh_add_systemd_config
 
-yunohost service add $app --description="A short description of the app" --log="/var/log/$app/$app.log"
+#=================================================
+# GENERIC FINALIZATION
+#=================================================
+# SETUP LOGROTATE
+#=================================================
+ynh_script_progression --message="Configuring log rotation..."
 
-ynh_use_logrotate --non-append
+# Use logrotate to manage application logfile(s)
+ynh_use_logrotate
 
-ynh_add_fail2ban_config --logpath="/var/log/nginx/${domain}-error.log" --failregex="Regex to match into the log for a failed login"
+#=================================================
+# INTEGRATE SERVICE IN YUNOHOST
+#=================================================
+ynh_script_progression --message="Integrating service in YunoHost..."
+
+yunohost service add $app --log="/var/log/$app/$app.log"
 
 #=================================================
 # RECONFIGURE THE APP (UPDATE CONF, APPLY MIGRATIONS...)
@@ -107,25 +80,10 @@ ynh_add_fail2ban_config --logpath="/var/log/nginx/${domain}-error.log" --failreg
 #=================================================
 ynh_script_progression --message="Updating a configuration file..." --weight=1
 
-### Same as during install
-###
-### The file will automatically be backed-up if it's found to be manually modified (because
-### ynh_add_config keeps track of the file's checksum)
+ynh_add_config --template="../conf/jellyseerr.conf" --destination="$install_dir/jellyseerr.conf"
 
-ynh_add_config --template="some_config_file" --destination="$install_dir/some_config_file"
-
-# FIXME: this should be handled by the core in the future
-# You may need to use chmod 600 instead of 400,
-# for example if the app is expected to be able to modify its own config
-chmod 400 "$install_dir/some_config_file"
-chown $app:$app "$install_dir/some_config_file"
-
-### For more complex cases where you want to replace stuff using regexes,
-### you shoud rely on ynh_replace_string (which is basically a wrapper for sed)
-### When doing so, you also need to manually call ynh_store_file_checksum
-###
-### ynh_replace_string --match_string="match_string" --replace_string="replace_string" --target_file="$install_dir/some_config_file"
-### ynh_store_file_checksum --file="$install_dir/some_config_file"
+chmod 600 "$install_dir/jellyseerr.conf"
+chown $app:$app "$install_dir/jellyseerr.conf"
 
 #=================================================
 # START SYSTEMD SERVICE