Phase 1: scaffold local backend — models, schemas, routers, printer service, Docker

docker-compose.yml

@@ -0,0 +1,14 @@
+services:
+  backend:
+    build: ./local_backend
+    ports:
+      - "8000:8000"
+    restart: unless-stopped
+    env_file:
+      - ./local_backend/.env
+    volumes:
+      - ./local_backend/pos.db:/app/pos.db
+      - ./local_backend/license_state.json:/app/license_state.json
+      - ./logo.png:/app/logo.png:ro
+    extra_hosts:
+      - "host.docker.internal:host-gateway"