[DOCKER] Ruby on Rails basic learning ①
First about the development environment
** Benefits of using docker **
In the actual field, most of them use Docker as a virtual environment.
docker has a fast startup speed.
Since AWS has a service that executes containers, it is easy to publish the service.
Development environment using docker
Installing docker installs lightweight Linux (Moby Linux).
When you launch a ruby container with docker, a Ruby execution environment container will be launched on Moby Linux.
The base of the container is called an image.