feat: unified serve.sh with gateway mode support (#1847)

docker/docker-compose-dev.yaml

@@ -19,8 +19,6 @@ services:
   # cluster via the K8s API.
   # Backend accesses sandboxes directly via host.docker.internal:{NodePort}.
   provisioner:
-    profiles:
-      - provisioner
     build:
       context: ./provisioner
       dockerfile: Dockerfile
@@ -59,20 +57,25 @@ services:
 
   # ── Reverse Proxy ──────────────────────────────────────────────────────
   # Routes API traffic to gateway/langgraph and (optionally) provisioner.
-  # Select nginx config via NGINX_CONF:
-  # - nginx.local.conf (default): no provisioner route (local/aio modes)
-  # - nginx.conf: includes provisioner route (provisioner mode)
+  # LANGGRAPH_UPSTREAM and LANGGRAPH_REWRITE control gateway vs standard
+  # routing (processed by envsubst at container start).
   nginx:
     image: nginx:alpine
     container_name: deer-flow-nginx
     ports:
       - "2026:2026"
     volumes:
-      - ./nginx/${NGINX_CONF:-nginx.conf}:/etc/nginx/nginx.conf:ro
+      - ./nginx/nginx.conf:/etc/nginx/nginx.conf.template:ro
+    environment:
+      - LANGGRAPH_UPSTREAM=${LANGGRAPH_UPSTREAM:-langgraph:2024}
+      - LANGGRAPH_REWRITE=${LANGGRAPH_REWRITE:-/}
+    command: >
+      sh -c "envsubst '$$LANGGRAPH_UPSTREAM $$LANGGRAPH_REWRITE'
+      < /etc/nginx/nginx.conf.template > /etc/nginx/nginx.conf
+      && nginx -g 'daemon off;'"
     depends_on:
       - frontend
       - gateway
-      - langgraph
     networks:
       - deer-flow-dev
     restart: unless-stopped