-data>Setting up the database for ratings data</h3><p>For this task you set up an instance of <a href=https://www.mysql.com>MySQL</a>. You can use any MySQL instance; I used
<a href=https://www.ibm.com/cloud/compose/mysql>Compose for MySQL</a>. I used <code>mysqlsh</code>
(<a href=https://dev.mysql.com/doc/mysql-shell/en/>MySQL Shell</a>) as a MySQL client to feed the ratings data.</p><ol><li><p>Set the <code>MYSQL_DB_HOST</code> and <code>MYSQL_DB_PORT</code> environment variables:</p><pre><code class=lang