ou set up a MongoDB database instance to hold book ratings data outside of your Kubernetes cluster. Then you
modify the <a href=/v1.18/docs/examples/bookinfo/>Bookinfo sample application</a> to use your database.</p><h3 id=setting-up-the-ratings-database>Setting up the ratings database</h3><p>For this task you set up an instance of <a href=https://www.mongodb.com>MongoDB</a>. You can use any MongoDB instance; I used
<a href=https://www.ibm.com/cloud/compose/mongodb>Compose for MongoDB</a>.</p><ol><li><p>Set