Noticed this line while looking for some Dockerfile examples: https://github.com/rails/rails/blob/a35ceb429cddc13c0cc71a31d2d3e9ec8c91ef53/railties/lib/rails/generators/rails/app/templates/Dockerfile.tt#L14
I’d be happy to make a PR to include test in the list of groups that shouldn’t be installed. Just didn’t want to make the change if there were a reason to include it.
