调试容器中的FastAPI应用

1. 镜像中需添加 debugpy 依赖库，并在启动容器时运行 debugpy 模块

   FROM tiangolo/uvicorn-gunicorn-fastapi:python3.7
   # Note: In default, the working directory is /app in this base image.
    
   COPY requirements.txt .
   RUN pip install --no-cache-dir -r requirements.txt
    
   EXPOSE 5678
   EXPOSE 8000
    
   COPY ./app /app
   ENTRYPOINT ["python3", "-m", "debugpy", "--listen", "0.0.0.0:5678", "-m", "uvicorn", "main:app", "--reload", "--host", "0.0.0.0", "--port", "8000"]

   Code Snippet 1: Dockerfile

2. 运行时连接 debugpy 服务端的监听端口，并设置本地和容器的项目路径映射

   {
     "version": "0.2.0",
     "configurations": [
       {
         "name": "Python: FastAPI Container Debug",
         "type": "debugpy",
         "request": "attach",
         "connect": {
           "port": 5678,
           "host": "localhost",
         },
         "pathMappings": [
           {
             "localRoot": "${workspaceFolder}/app",
             "remoteRoot": "/app"
           }
         ]
       }
     ]
   }

   Code Snippet 2: .vscode/launch.json