Docker for Rails Developers

Closing Thoughts on Docker in Development

As we draw to the close of this section on development, let’s take a moment to reflect on what we’ve achieved. At first glance, it’s easy to mistakenly think we’ve gone through a fair amount of effort only to arrive back where we started—with a standard, working Rails app.

In fact, though, we’ve achieved some major benefits:

• Our Dockerfile and docker-compose.yml file give us a declarative description of our entire application—with all its required parts, such the database—helping to give a clear picture of what makes up the application.

• We can spin up the entire application with a single command—even with nothing previously installed. Docker downloads and installs what we need.

• We’ve eliminated the need ...