old_contents: from readthedocs.settings.sqlite import *
  
  import os
  environ = os.environ
  
  DATABASES = {
      'default': {
          'ENGINE': 'django.db.backends.postgresql_psycopg2',
          'NAME': environ['DB_ENV_DB_NAME'],
          'USER': environ['DB_ENV_DB_USER'],
          'PASSWORD': environ['DB_ENV_DB_PASS'],
          'HOST': 'db',
          'PORT': 5432,
      }
  }
  SITE_ROOT = '/app'
  ES_HOSTS = ['elasticsearch:9200']
  REDIS = {
      'host': 'redis',
      'port': 6379,
      'db': 0,
  }
  BROKER_URL = 'redis://redis:6379/0'
  CELERY_RESULT_BACKEND = 'redis://redis:6379/0'
  DEBUG = True
  CELERY_ALWAYS_EAGER = False
  
new_contents: from readthedocs.settings.dev import *
  
  import os
  environ = os.environ
  
  DATABASES = {
      'default': {
          'ENGINE': 'django.db.backends.postgresql_psycopg2',
          'NAME': environ['DB_ENV_DB_NAME'],
          'USER': environ['DB_ENV_DB_USER'],
          'PASSWORD': environ['DB_ENV_DB_PASS'],
          'HOST': 'db',
          'PORT': 5432,
      }
  }
  SITE_ROOT = '/app'
  ES_HOSTS = ['elasticsearch:9200']
  REDIS = {
      'host': 'redis',
      'port': 6379,
      'db': 0,
  }
  BROKER_URL = 'redis://redis:6379/0'
  CELERY_RESULT_BACKEND = 'redis://redis:6379/0'
  DEBUG = True
  CELERY_ALWAYS_EAGER = False
  
subject: Fix import error