chore: add community templates, simplify setup, fix lockfile (#177)

.env.example

@@ -1,8 +1,7 @@
-NEXT_PUBLIC_GOOGLE_MAPS_API_KEY=your_google_maps_api_key
-PORT=3000
-POSTGRES_URL=postgresql://postgres:postgres@127.0.0.1:55322/postgres
+# Optional environment variables — the editor works without any of these
 
-# Run `bun db:start` then `bunx supabase status -o env` to get these values
-NEXT_PUBLIC_SUPABASE_URL=http://127.0.0.1:55321
-NEXT_PUBLIC_SUPABASE_ANON_KEY=your_supabase_anon_key
-SUPABASE_SERVICE_ROLE_KEY=your_supabase_service_role_key
+# Google Maps API key (enables address search)
+# NEXT_PUBLIC_GOOGLE_MAPS_API_KEY=your_google_maps_api_key
+
+# Dev server port (default: 3000)
+# PORT=3000