add basic backend

docker-compose.yml

@@ -0,0 +1,16 @@
+services:
+  backend:
+    build: ./backend
+    ports:
+      - "7000:7000"
+    command: --host 0.0.0.0
+    depends_on:
+      - db
+  db:
+    image: postgres:17-alpine
+    environment:
+      POSTGRES_USER: $POSTGRES_USER
+      POSTGRES_PASSWORD: $POSTGRES_PASSWORD
+      POSTGRES_DB: nuchat
+    ports:
+      - "5432:5432"