MEga push vol idk, chat function updates, docker fixes

.env.example

@@ -1,18 +1,25 @@
+# ── Supabase ──
 PUBLIC_SUPABASE_URL=your_supabase_url
 PUBLIC_SUPABASE_ANON_KEY=your_supabase_anon_key
 # Service role key — required for admin operations (invite emails, etc.)
 # Find it in Supabase Dashboard → Settings → API → service_role key
 SUPABASE_SERVICE_ROLE_KEY=your_supabase_service_role_key
 
+# ── Google ──
 GOOGLE_API_KEY=your_google_api_key
 # Google Service Account for Calendar push (create/update/delete events)
 # Paste the full JSON key file contents, or base64-encode it
 # The calendar must be shared with the service account email (with "Make changes to events" permission)
 GOOGLE_SERVICE_ACCOUNT_KEY=
 
-# Matrix / Synapse integration
+# ── Matrix / Synapse (optional — chat is not yet enabled) ──
 # The homeserver URL where your Synapse instance is running
 MATRIX_HOMESERVER_URL=https://matrix.example.com
 # Synapse Admin API shared secret or admin access token
 # Used to auto-provision Matrix accounts for users
 MATRIX_ADMIN_TOKEN=
+
+# ── Docker / Production ──
+# Public URL of the app — required by SvelteKit node adapter for CSRF protection
+# Set this to your actual domain in production (e.g. https://app.example.com)
+ORIGIN=http://localhost:3000