fix: disable general notification button and add install recommendation · MaSch0212/minigolf-friday@07ea911

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v3, actions/setup-node@v3. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context. Auto-generated code requires an explicit '#nullable' directive in source.

src/server/host/Endpoints/Administration/Events/StartEventEndpoint.cs#L34

Parameter 'userPushSubscriptionMapper' is unread.

src/client/src/app/+state/action-state.ts#L72

'x' is defined but never used. Allowed unused vars must match /^_/u

src/client/src/app/+state/action-state.ts#L100