Ask for finalizing the upgrade in the app

doc/POST_UPGRADE.md

@@ -0,0 +1,15 @@
+## You need now to finalize the upgrade process of ZwiiCMS directly in the app.
+
+#### 1. Login with your admin account
+
+#### 2. Go to setup page
+
+![Setup menu](./upgrade_process_1.png)
+
+#### 3. Click on Reinstall
+
+![Reinstall](./upgrade_process_2.png)
+
+#### 4. If needed, deactivate the maintenance mode
+
+![Maintenance mode](./upgrade_process_3.png)

doc/PRE_UPGRADE.md

@@ -0,0 +1,6 @@
+## Disclaimers / important information
+By continuing the app will stay in **maintenance mode** until a manual finalization.
+
+The manual finalization process is easy. You just need to be able to access the webapp and login with your admin account.
+
+This process will be explain at the end of the upgarde proccess.

scripts/upgrade

@@ -30,6 +30,13 @@ find "$install_dir" -type f -exec chmod 640 {} \;
 find "$install_dir" -type d -exec chmod 750 {} \;
 find "$install_dir" -type d -exec chmod +s {} \;
 
+#=================================================
+# UPDATE A CONFIG FILE
+#=================================================
+
+# Apply maintenance mode
+sed -i 's/"maintenance":[^,]*/"maintenance":true/g' "$install_dir/site/data/config.json"
+
 #=================================================
 # REAPPLY SYSTEM CONFIGURATIONS
 #=================================================