Without this it risks some bundler dependencies being installed in the user-home which then get handled differently for Dockerfiles that inherit this one

We are installing from a gem file directly so there is no need to specify a version

This will stop then being cleaned up bundler when used in an app image. If they are specified in the apps Gemfile, then they will not get cleaned up but `nexus bu` will fail as the gems are not public.

This is required to install Jetbrains versions of debugging gems debase and ruby-debug-ide

Revert "Add debase"

See merge request nexus-mods/public/rails-build!5

This reverts commit 02b6debf

chore: upgrade ruby gems

See merge request nexus-mods/public/rails-build!4

Ruby 3 2

See merge request nexus-mods/public/rails-build!3