Use MySQL with NodeJS app

I was looking this project https://glitch.com/~lamp-poc and wondering if is possible to use the MySQL server with a NodeJS app, if so how does i install MySQL in the container? Thanks in advance!

Anyone can answer my question please?

there is a node driver for mysql: https://www.npmjs.com/package/mysql

I know but i just need to make the connection part with the module? Or i need to install something in the container?.
Also thanks for answering @jenn!

MySQL is already installed in the container. However, we recommend you use any of the following storage options: https://glitch.com/storage