Remove obsolete scripts and configuration files for self-hosting and database migrations

- Deleted `pnpm-workspace.yaml` as it is no longer needed.
- Removed `apply-migrations.sh` script that handled database migrations.
- Eliminated `generate-full-stack-env.mjs` script for environment variable generation.
- Deleted `selfhost-backup.sh` script for creating backups of the self-hosted environment.
- Removed `selfhost-doctor.sh` script for health checks of the self-hosted services.
- Deleted `selfhost-restore.sh` script for restoring backups in the self-hosted environment.

next.config.ts

@@ -8,7 +8,6 @@ const withPWA = withPWAInit({
 });
 
 const nextConfig: NextConfig = {
-  output: "standalone",
   experimental: {
     serverActions: {
       bodySizeLimit: "8mb",