One advantage Docker gives is the ability to install the production environment on our laptop. It's then very easy to push the same Docker setup to the cloud-hosting environment for staging or production deployment.
What we'll do in this section is demonstrate reusing the Docker Compose configuration defined previously for test infrastructure, and to automate executing the Notes test suite inside the containers using a shell script. Generally speaking, it's important to replicate the production environment when running tests. Docker can make this an easy thing to do.
Using Docker, we'll be able to easily test against a database, and have a simple method for starting and stopping a test version of our production environment. Let's get started.