docs(README): 更新项目部署文档添加完整部署指南

更新 README.md 文件，提供详细的单机部署指南，包括：
- 完整的服务架构说明和请求链路图解
- 环境变量配置说明和示例
- 逐步部署流程（镜像构建、网络创建、服务启动）
- 健康检查和首次注册验收步骤
- 常见问题解答

同时更新各个子模块的 README 添加环境变量示例文件引用

deploy-control/.env.example

@@ -0,0 +1,28 @@
+# deploy-control runtime config
+
+DEPLOY_CONTROL_HOST=0.0.0.0
+DEPLOY_CONTROL_PORT=8090
+DEPLOY_CONTROL_API_TOKEN=change-me
+
+APP_INSTANCE_IMAGE=nano/app-instance:latest
+APP_INSTANCE_NETWORK_NAME=nano-instance-edge
+
+APP_INSTANCE_PROVIDER=openai
+APP_INSTANCE_MODEL=openai/gpt-5
+APP_INSTANCE_API_KEY=sk-xxxxxxxx
+APP_INSTANCE_API_BASE=
+
+# Used as a fallback when authz-service does not explicitly pass authz_base_url.
+DEFAULT_AUTHZ_BASE_URL=http://nano-authz-service:19090
+
+DEPLOY_PUBLIC_SCHEME=http
+DEPLOY_PUBLIC_BASE_DOMAIN=203.0.113.10.nip.io
+DEPLOY_PUBLIC_HOST_TEMPLATE={slug}.{base_domain}
+DEPLOY_PUBLIC_PORT=8088
+DEPLOY_AUTO_START_PROXY=1
+DEPLOY_HEALTH_TIMEOUT_SECONDS=60
+DEPLOY_HEALTH_INTERVAL_SECONDS=1
+
+# Passed through to create-instance.sh when the app-instance image is rebuilt.
+AUTH_PORTAL_URL=http://203.0.113.10:3081
+AUTH_PORTAL_PORT=3081