Fix Gemfile & Dockerfile to get passing tests #460

Job	Run time
rails_edge	30s
Ruby 3.0 (gemfiles/rails_6_0.gemfile)	44s
ruby_edge (gemfiles/rails_6_0.gemfile)	1m 37s
Ruby 3.0 (gemfiles/rails_6_1.gemfile)	40s
ruby_edge (gemfiles/rails_6_1.gemfile)	1m 32s
Ruby 3.0 (gemfiles/rails_7_0.gemfile)	40s
Ruby 3.0 (gemfiles/rails_7_1.gemfile)	42s
ruby_edge (gemfiles/rails_7_0.gemfile)	1m 43s
Ruby 3.1 (gemfiles/rails_6_0.gemfile)	43s
ruby_edge (gemfiles/rails_7_1.gemfile)	1m 44s
Ruby 3.1 (gemfiles/rails_6_1.gemfile)	40s
Ruby 3.1 (gemfiles/rails_7_0.gemfile)	45s
Ruby 3.1 (gemfiles/rails_7_1.gemfile)	44s
Ruby 3.2 (gemfiles/rails_6_0.gemfile)	43s
Ruby 3.2 (gemfiles/rails_6_1.gemfile)	39s
Ruby 3.2 (gemfiles/rails_7_0.gemfile)	41s
Ruby 3.2 (gemfiles/rails_7_1.gemfile)	47s
Ruby 3.3 (gemfiles/rails_6_0.gemfile)	40s
Ruby 3.3 (gemfiles/rails_6_1.gemfile)	51s
Ruby 3.3 (gemfiles/rails_7_0.gemfile)	41s
Ruby 3.3 (gemfiles/rails_7_1.gemfile)	40s
	18m 26s

Provide feedback