Update contribution docs and templates for best practices

Refreshed AI.md with new reference scripts, expanded checklist, and improved AI assistant tips. Updated container and install script templates for modern defaults (Debian 13, larger disk, two tags), clarified helper function usage, and improved update/backup patterns. Enhanced JSON template with realistic metadata, new fields, and example notes.

docs/contribution/templates_json/AppName.json

@@ -4,25 +4,26 @@
   "categories": [
     0
   ],
-  "date_created": "DATE CREATED",
+  "date_created": "2026-01-18",
   "type": "ct",
   "updateable": true,
   "privileged": false,
-  "interface_port": "DEFAULT-PORT",
-  "documentation": null,
-  "website": "LINK TO WEBSITE",
-  "logo": "LINK TO LOGO",
-  "description": "Description of the app",
+  "interface_port": 3000,
+  "documentation": "https://docs.example.com/",
+  "website": "https://example.com/",
+  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/appname.webp",
+  "config_path": "/opt/appname/.env",
+  "description": "Short description of what AppName does and its main features.",
   "install_methods": [
     {
       "type": "default",
-      "script": "ct/AppName.sh",
+      "script": "ct/appname.sh",
       "resources": {
         "cpu": 2,
         "ram": 2048,
-        "hdd": 4,
-        "os": "debian",
-        "version": "12"
+        "hdd": 8,
+        "os": "Debian",
+        "version": "13"
       }
     }
   ],
@@ -30,5 +31,10 @@
     "username": null,
     "password": null
   },
-  "notes": []
+  "notes": [
+    {
+      "text": "Change the default password after first login!",
+      "type": "warning"
+    }
+  ]
 }