接下來我都會用 Docker 來實作，流程如下：

1. 首先你的電腦需要安裝 Docker 桌機版
2. 撰寫 Dockerfile 來 build image

FROM python:3.9.5-slim-buster
RUN apt-get update \
    && apt-get -y install libpq-dev gcc vim poppler-utils

# set work directory
WORKDIR /usr/src/app

COPY ./requirements.txt /code/requirements.txt
RUN pip install -U pip
RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt

COPY . .

3. 定義 FastAPI main.py

def get_application():
    app = FastAPI()
    app.openapi = custom_openapi

    origins = ["*"]

    app.add_middleware(
        CORSMiddleware,
        allow_origins=origins,
        allow_credentials=True,
        allow_methods=["*"],
        allow_headers=["*"],
    )

    app.include_router(docs.router)
    app.include_router(test.router, tags=["測試"], prefix="/hello")
    app.mount("/static", StaticFiles(directory="static"), name="static")

    return app

app = get_application()

4. 寫 FastAPI 的路由

from fastapi import APIRouter

router = APIRouter()

@router.get("", summary="Hello World!")
async def hello_world():
    """Hello World"""
    return "Hello World"

5. 利用 docker-compose 指令來起 Docker 服務

version: '3'

services:
    fastapi:
        container_name: fastapi
        build: "."
        volumes:
          - .:/usr/src/app
        ports:
          - "5000:5000"
        command: uvicorn app.main:app --host 0.0.0.0 --port 5000 --reload

docker-compose up -d

6. 打開 swagger doc 檢查

位置是 http://localhost:5000/docs

詳細程式碼參考連結