Docker容器内Uvicorn热重载失效问题求助

在Docker容器中部署FastAPI应用时遇到热重载失效问题。已确认卷映射正常，容器内文件可同步更新，控制台日志显示Uvicorn正在监听正确目录，但代码修改无法触发应用重载。

docker-compose.yaml配置 #

version: "3"

services:
  app:
    container_name: api
    image: api:latest
    depends_on:
      - mysqldb
    build: 
      context: .
      dockerfile: Dockerfile.dev
      args:
        DEV: "true"
    ports:
      - "8080:8080"
    env_file:
      - .env
    environment:
      - WATCHFILES_FORCE_POLLING=true
      - DEV=1
      - MYSQL_HOSTNAME=mysqldb
      - MYSQL_PORT=3306
    command: uvicorn app.main:app --host 0.0.0.0 --port 8080 --reload --reload-dir /src/app
    volumes:
      - ./app:/src/app
  mysqldb:
    container_name: mysqldb
    image: mysql:latest
    restart: always
    ports:
     - 3307:3306
    environment:
      MYSQL_ROOT_PASSWORD: randompassword
      MYSQL_DATABASE: my-database

Dockerfile.dev配置 #

FROM python:3.10-slim-buster

ENV PYTHONUNBUFFERED 1

COPY requirements.txt /
COPY alembic.ini /
COPY migrations /migrations

RUN pip install --upgrade pip setuptools wheel gunicorn uvloop httptools
RUN pip install -r requirements.txt
RUN pip install torch torchvision --index-url https://download.pytorch.org/whl/cpu
RUN pip install sentence-transformers 

# Copy the source code to src folder
COPY . /src

ENV PYTHONPATH=/src

EXPOSE 8080

# FOR local dev the startup happens inside the docker-compose with reload options
COPY startup.sh /src/startup.sh
RUN chmod +x /src/startup.sh

CMD ["uvicorn", "app.main:app","--host", "0.0.0.0", "--port", "8080", "--reload"]

已尝试的重载配置（均未解决） #

• 不在Dockerfile中执行uvicorn命令
• 将重载目录设置为根目录(/)、app及src/app
• 不指定重载目录
• 使用gunicorn替代uvicorn

内容的提问来源于stack exchange，提问作者Linksonder