如何在BitBucket管道上使用Docker来测试需要PostGIS的Django应用？

# 使用Python 3.9作为基础镜像
FROM python:3.9

# 设置工作目录
WORKDIR /app

# 复制应用代码到容器中
COPY . /app

# 安装依赖包
RUN pip install -r requirements.txt

# 安装PostGIS扩展
RUN apt-get update && apt-get install -y postgis

# 运行Django应用
CMD python manage.py runserver 0.0.0.0:8000

version: '3'
services:
  web:
    build:
      context: .
      dockerfile: Dockerfile
    ports:
      - "8000:8000"
    depends_on:
      - db
  db:
    image: postgis/postgis:13-3.1
    environment:
      - POSTGRES_USER=your_postgres_user
      - POSTGRES_PASSWORD=your_postgres_password
      - POSTGRES_DB=your_postgres_db

pipelines:
  default:
    - step:
        name: Test
        image: your_image_name
        script:
          - python manage.py test