Though there is a .travis.yml, but doesn't look like it's available on Travis CI: https://app.travis-ci.com/github/stringer-rss/stringer, and https://travis-ci.org/swanson/stringer is ceased, the last build on it was 7 months ago, might because the merge of travis-ci.com & travis-ci.org, and the new service plans, would need to enable it again.