Complete Docker compose deployment setup

- Add an API container entrypoint that waits for PostgreSQL, runs Prisma migrations, seeds demo data, and then starts NestJS.

- Keep Prisma CLI and seed dependencies available in the API runtime image and copy seed source dependencies into the container.

- Add Docker Compose healthchecks and health-based startup ordering for PostgreSQL, API, and Nginx web services.

- Add Docker initialization environment switches for migrations, seed, and startup retries.

- Add a dedicated Docker deployment guide covering services, ports, initialization, HTTPS, production variables, backup, restore, and troubleshooting.

- Update README, AGENTS, installation, deployment, progress, and environment example docs for the Dockerized workflow.

docs/installation.md

@@ -38,7 +38,6 @@ docker compose version
 第一次启动：
 
 ```bash
-npm install
 docker compose up -d --build
 ```
 
@@ -62,6 +61,8 @@ curl http://localhost:3002/api/health
 - `tuwen_api`：NestJS API，容器内监听 `3100`，宿主机端口 `3002`。
 - `tuwen_db`：PostgreSQL 16，宿主机端口 `5433`。
 
+首次启动时，`tuwen_api` 会等待数据库健康，自动执行 `prisma migrate deploy` 和 `prisma db seed`，再启动 API。完整 Docker 部署细节见 [Docker 化部署](./docker.md)。
+
 查看状态：
 
 ```bash