Added isOfficial

public/v2/apps/joomla.json

@@ -3,6 +3,7 @@
     "documentation": "Taken from https://hub.docker.com/_/joomla?tab=description. Based on Wordpress - No Database template.",
     "displayName": "Joomla - No Database",
     "description": "This will create a Joomla only. You will need to create and configure the database information manually. Intended for advanced users.",
+    "isOfficial": true,
     "dockerCompose": {
         "version": "3.3",
         "services": {