{'version': '3.9',
 'services': {'web': {'build': '.',
                      'ports': ['8000:8000'],
                      'environment': ['DEBUG=1'],
                      'depends_on': ['db', 'redis'],
                      'volumes': ['./app:/code/app']},
              'db': {'image': 'postgres:16',
                     'environment': {'POSTGRES_PASSWORD': 'secret',
                                     'POSTGRES_DB': 'app'},
                     'volumes': ['db-data:/var/lib/postgresql/data']},
              'redis': {'image': 'redis:7'}},
 'volumes': {'db-data': None}}