Nightly CI build for the Rails repo

Daily build with Ruby head

Failed in 4m 46s
:pipeline: rails-nightly-initial-pipeline
:docker: rubylang/ruby:master
Waited 10s
·
Ran in 2m 54s
:docker: rubylang/ruby:master-debug
Waited 2s
·
Ran in 4m 11s
Total Job Run Time: 7m 37s