Ruby 3.3.3 net-pop bug mitigation

Ruby 3.3.3 produces incorrect Gemfile.lock files, and that prevents successful deploys. This is not the experience we want for people running their first fly launch.

Ruby 3.3.3 was released on 12 June. Ruby 3.3.4 is planned for August or September.

To mitigate this problem, Dockerfile-rails v1.6.17 has been released, adding a workaround to your Dockerfile:

If you run fly launch, and your project doesn’t have an existing Dockerfile, a Dockerfile with the workaround will be generated for you. If, however, you do have an existing Dockerfile, we will detect the issue and direct you to next steps you can take: