Nightly CI build for the Rails repo

Daily build with Ruby head

Failed in 6m 44s
:pipeline: rails-nightly-initial-pipeline
:docker: rubylang/ruby:master
Waited 9s
·
Ran in 3m 36s
:docker: rubylang/ruby:master-debug
Waited 5s
·
Ran in 6m 5s
Total Job Run Time: 10m 13s