use checklists in manifest

CloudronManifest.json

@@ -49,7 +49,12 @@
   ],
   "changelog": "file://CHANGELOG.md",
   "postInstallMessage": "file://POSTINSTALL.md",
-  "minBoxVersion": "7.5.1",
+    "checklist": {
+    "change-default-password": {
+      "message": "Change the default admin password"
+    }
+  },
+  "minBoxVersion": "8.1.0",
   "forumUrl": "https://forum.cloudron.io/category/19/gitea",
   "documentationUrl": "https://docs.cloudron.io/apps/gitea/"
 }

POSTINSTALL.md

@@ -3,8 +3,6 @@ This app is pre-setup with an admin account. The initial credentials are:
 **Username**: root<br/>
 **Password**: changeme<br/>
 
-Please change the admin password immediately.
-
 <sso>
 Use the `Local` authentication source for logging in as admin.
 </sso>