Containerizing our application
Before we start laying the foundation of how we deploy our application to the cloud, we need to have our application running inside containers. To introduce containers, let's first analyze the problem they try to solve.
To build and run our ElixirDrip project, we need Erlang, Elixir, and Node.js correctly installed and available in the current $PATH, ready to be used. To deploy the application in production, we need to make sure those dependencies have the exact same version and are installed in production in the exact same way, because only then we can be sure the application behavior will be the same.
Doing things like this is cumbersome and time-consuming, but not an impossible endeavor. If only we had a cleaner way of building the environment and then saving it, so we could reuse it at a later time, wherever we needed it. This is exactly what containers allow us to do.
Containers are lightweight wrappers for applications, which not only contain the applications...
