Now that you have learned how to create and properly write a Dockerfile, it's time to learn how to take it from just a file to an actual image. There are a lot of switches that you can use while using the docker build command. So, let's use the always handy --help switch on the docker build command to view what all we can do:

$ docker image build --help 
  Usage: docker image build [OPTIONS] PATH | URL | -
  Build an image from a Dockerfile

There are then a lot of flags listed that you can pass when building your image.