wip: git: ignore vendor/bundle dir
wip: rubygems: use rack-middleware-json-parser
wip: rubygems: update Gemfile
wip: rubygems: update Gemfile.lock
wip: use environment variables to set session_secret
wip: spec: add test for POST /api/v0/repositories
wip: seeds: change deps_to => deps
wip: rubygems: update Gemfiles
wip: rubygems: update social_snippet-registry_core version