old_contents: import os
  
  SECRET_KEY = os.environ.get("SECRET_KEY")
  DEBUG = os.environ.get("DEBUG", "False") == "True"
  MONGODB_SETTINGS = { "db": os.environ.get("MONGODB_DB", "zifbin") }
  
new_contents: import os
  
  SECRET_KEY = os.environ.get("SECRET_KEY")
  DEBUG = os.environ.get("DEBUG", "False") == "True"
  MONGODB_SETTINGS = {
      "db": os.environ.get("MONGODB_DB", "zifbin"),
      "host": os.environ.get("MONGODB_HOST", "localhost"),
      "port": int(os.environ.get("MONGODB_PORT", "27017")),
  }
  
subject: update config for external mongo