Add Kubernetes-based sandbox provider for multi-instance support (#19)

* feat: adds docker-based dev environment

* docs: updates Docker command help

* fix local dev

* feat(sandbox): add Kubernetes-based sandbox provider for multi-instance support

* fix: skills path in k8s

* feat: add example config for k8s sandbox

* fix: docker config

* fix: load skills on docker dev

* feat: support sandbox execution to Kubernetes Deployment model

* chore: rename web service name

docker/docker-compose-dev.yaml

@@ -3,8 +3,8 @@
 #
 # Services:
 #   - nginx: Reverse proxy (port 2026)
-#   - web: Frontend Next.js dev server (port 3000)
-#   - api: Backend Gateway API (port 8001)
+#   - frontend: Frontend Next.js dev server (port 3000)
+#   - gateway: Backend Gateway API (port 8001)
 #   - langgraph: LangGraph server (port 2024)
 #
 # Access: http://localhost:2026
@@ -19,29 +19,34 @@ services:
     volumes:
       - ./nginx/nginx.conf:/etc/nginx/nginx.conf:ro
     depends_on:
-      - web
-      - api
+      - frontend
+      - gateway
       - langgraph
     networks:
       - deer-flow-dev
     restart: unless-stopped
 
   # Frontend - Next.js Development Server
-  web:
+  frontend:
     build:
-      context: ../frontend
-      dockerfile: Dockerfile
+      context: ../
+      dockerfile: frontend/Dockerfile
       args:
         PNPM_STORE_PATH: ${PNPM_STORE_PATH:-/root/.local/share/pnpm/store}
-    container_name: deer-flow-web
-    command: pnpm run dev
+    container_name: deer-flow-frontend
+    command: sh -c "cd frontend && pnpm run dev > /app/logs/frontend.log 2>&1"
     volumes:
-      - ../frontend:/app
+      - ../frontend/src:/app/frontend/src
+      - ../frontend/public:/app/frontend/public
+      - ../frontend/next.config.js:/app/frontend/next.config.js:ro
+      - ../logs:/app/logs
       # Mount pnpm store for caching
       - ${PNPM_STORE_PATH:-~/.local/share/pnpm/store}:/root/.local/share/pnpm/store
+    working_dir: /app
     environment:
       - NODE_ENV=development
       - WATCHPACK_POLLING=true
+      - CI=true
     env_file:
       - ../frontend/.env
     networks:
@@ -49,17 +54,26 @@ services:
     restart: unless-stopped
 
   # Backend - Gateway API
-  api:
+  gateway:
     build:
-      context: ../backend
-      dockerfile: Dockerfile
-    container_name: deer-flow-api
-    command: uv run uvicorn src.gateway.app:app --host 0.0.0.0 --port 8001 --reload
+      context: ../
+      dockerfile: backend/Dockerfile
+    container_name: deer-flow-gateway
+    command: sh -c "cd backend && uv run uvicorn src.gateway.app:app --host 0.0.0.0 --port 8001 --reload --reload-include='*.yaml .env' > /app/logs/gateway.log 2>&1"
     volumes:
-      - ../backend:/app
-      - ../config.yaml:/app/config.yaml:ro
+      - ../backend/src:/app/backend/src
+      - ../backend/.env:/app/backend/.env
+      - ../config.yaml:/app/config.yaml
+      - ../skills:/app/skills
+      - ../logs:/app/logs
+    working_dir: /app
+    environment:
+      - CI=true
     env_file:
       - ../backend/.env
+    extra_hosts:
+      # For Linux: map host.docker.internal to host gateway
+      - "host.docker.internal:host-gateway"
     networks:
       - deer-flow-dev
     restart: unless-stopped
@@ -67,13 +81,19 @@ services:
   # Backend - LangGraph Server
   langgraph:
     build:
-      context: ../backend
-      dockerfile: Dockerfile
+      context: ../
+      dockerfile: backend/Dockerfile
     container_name: deer-flow-langgraph
-    command: uv run langgraph dev --no-browser --allow-blocking --no-reload --host 0.0.0.0 --port 2024
+    command: sh -c "cd backend && uv run langgraph dev --no-browser --allow-blocking --host 0.0.0.0 --port 2024 > /app/logs/langgraph.log 2>&1"
     volumes:
-      - ../backend:/app
-      - ../config.yaml:/app/config.yaml:ro
+      - ../backend/src:/app/backend/src
+      - ../backend/.env:/app/backend/.env
+      - ../config.yaml:/app/config.yaml
+      - ../skills:/app/skills
+      - ../logs:/app/logs
+    working_dir: /app
+    environment:
+      - CI=true
     env_file:
       - ../backend/.env
     networks: