Looks good for a first dockerfile. You may want to try combining several of the run commands together to save on the number of layers generated and improve the

Looks good for a first dockerfile. You may want to try combining several of the run commands together to save on the number of layers generated and improve the final size. A good rule of thumb is to combine if the command can touch the files of a previous command. Then it becomes easy to clean up after downloading a package (no need to have the downloaded version and the installed).