docs: update Docker Compose section to reflect new docker/ layout

- Use docker compose -f docker/docker-compose.yml for all commands
- Update setup flow: first run generates docker/data/config.json,
  container exits, user edits config, then restarts
- Replace "Rebuild" section with "Update" (docker pull) since the
  compose file now uses the pre-built sipeed/picoclaw image
- Apply same changes to README.zh.md

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

README.md

@@ -167,39 +167,43 @@ You can also run PicoClaw using Docker Compose without installing anything local
 git clone https://github.com/sipeed/picoclaw.git
 cd picoclaw
 
-# 2. Set your API keys
-cp config/config.example.json config/config.json
-vim config/config.json      # Set DISCORD_BOT_TOKEN, API keys, etc.
+# 2. First run — auto-generates docker/data/config.json then exits
+docker compose -f docker/docker-compose.yml --profile gateway up
+# The container prints "First-run setup complete." and stops.
 
-# 3. Build & Start
-docker compose --profile gateway up -d
+# 3. Set your API keys
+vim docker/data/config.json   # Set provider API keys, bot tokens, etc.
+
+# 4. Start
+docker compose -f docker/docker-compose.yml --profile gateway up -d
+```
 
 > [!TIP]
 > **Docker Users**: By default, the Gateway listens on `127.0.0.1` which is not accessible from the host. If you need to access the health endpoints or expose ports, set `PICOCLAW_GATEWAY_HOST=0.0.0.0` in your environment or update `config.json`.
 
+```bash
+# 5. Check logs
+docker compose -f docker/docker-compose.yml logs -f picoclaw-gateway
 
-# 4. Check logs
-docker compose logs -f picoclaw-gateway
-
-# 5. Stop
-docker compose --profile gateway down
+# 6. Stop
+docker compose -f docker/docker-compose.yml --profile gateway down
 ```
 
 ### Agent Mode (One-shot)
 
 ```bash
 # Ask a question
-docker compose run --rm picoclaw-agent -m "What is 2+2?"
+docker compose -f docker/docker-compose.yml run --rm picoclaw-agent -m "What is 2+2?"
 
 # Interactive mode
-docker compose run --rm picoclaw-agent
+docker compose -f docker/docker-compose.yml run --rm picoclaw-agent
 ```
 
-### Rebuild
+### Update
 
 ```bash
-docker compose --profile gateway build --no-cache
-docker compose --profile gateway up -d
+docker compose -f docker/docker-compose.yml pull
+docker compose -f docker/docker-compose.yml --profile gateway up -d
 ```
 
 ### 🚀 Quick Start

README.zh.md

@@ -166,41 +166,43 @@ make install
 git clone https://github.com/sipeed/picoclaw.git
 cd picoclaw
 
-# 2. 设置 API Key
-cp config/config.example.json config/config.json
-vim config/config.json      # 设置 DISCORD_BOT_TOKEN, API keys 等
+# 2. 首次运行 — 自动生成 docker/data/config.json 后退出
+docker compose -f docker/docker-compose.yml --profile gateway up
+# 容器打印 "First-run setup complete." 后自动停止
 
-# 3. 构建并启动
-docker compose --profile gateway up -d
+# 3. 填写 API Key 等配置
+vim docker/data/config.json   # 设置 provider API key、Bot Token 等
+
+# 4. 正式启动
+docker compose -f docker/docker-compose.yml --profile gateway up -d
+```
 
 > [!TIP]
-**Docker 用户**: 默认情况下, Gateway监听 `127.0.0.1`，这使得这个端口未暴露到容器外。如果你需要通过端口映射访问健康检查接口, 请在环境变量中设置 `PICOCLAW_GATEWAY_HOST=0.0.0.0` 或修改 `config.json`。
+> **Docker 用户**: 默认情况下, Gateway 监听 `127.0.0.1`，该端口不会暴露到容器外。如果需要通过端口映射访问健康检查接口，请在环境变量中设置 `PICOCLAW_GATEWAY_HOST=0.0.0.0` 或修改 `config.json`。
 
-# 4. 查看日志
-docker compose logs -f picoclaw-gateway
-
-# 5. 停止
-docker compose --profile gateway down
+```bash
+# 5. 查看日志
+docker compose -f docker/docker-compose.yml logs -f picoclaw-gateway
 
+# 6. 停止
+docker compose -f docker/docker-compose.yml --profile gateway down
 ```
 
 ### Agent 模式 (一次性运行)
 
 ```bash
 # 提问
-docker compose run --rm picoclaw-agent -m "2+2 等于几？"
+docker compose -f docker/docker-compose.yml run --rm picoclaw-agent -m "2+2 等于几？"
 
 # 交互模式
-docker compose run --rm picoclaw-agent
-
+docker compose -f docker/docker-compose.yml run --rm picoclaw-agent
 ```
 
-### 重新构建
+### 更新镜像
 
 ```bash
-docker compose --profile gateway build --no-cache
-docker compose --profile gateway up -d
-
+docker compose -f docker/docker-compose.yml pull
+docker compose -f docker/docker-compose.yml --profile gateway up -d
 ```
 
 ### 🚀 快速开始