As a MongoDB cloud database service, mLab is a third-party service that runs on cloud providers. It has also collaborated with PaaS providers:
mLab home page
mLab provides a free sandbox version up to 0.5 GB, which is enough for our order-api application. Go to the mLab website (https://mlab.com/) and create a new account.
After you create the account, create a new database for Google Cloud Platform, called order-api:
mLab database for order-api
Once you've created the database, create a new user for this database, called ...
