Initial commit — DRB server stack

Includes c2-core (FastAPI/MQTT/Firestore), discord-bot (slash commands),
frontend (Next.js admin UI), and mosquitto config.

drb-frontend/.env.example

@@ -0,0 +1,12 @@
+# Firebase — get these from your Firebase project settings
+NEXT_PUBLIC_FIREBASE_API_KEY=
+NEXT_PUBLIC_FIREBASE_AUTH_DOMAIN=
+NEXT_PUBLIC_FIREBASE_PROJECT_ID=
+NEXT_PUBLIC_FIREBASE_STORAGE_BUCKET=
+NEXT_PUBLIC_FIREBASE_MESSAGING_SENDER_ID=
+NEXT_PUBLIC_FIREBASE_APP_ID=
+# Named Firestore database (omit or set to "(default)" if using the default database)
+NEXT_PUBLIC_FIRESTORE_DATABASE=
+
+# C2 API — must be reachable from the browser (or a server-side proxy)
+NEXT_PUBLIC_C2_URL=http://localhost:8888