@see https://medium.com/google-developers/how-to-run-travisci-locally-on-docker-822fc6b2db2e
- Install Docker
- Install Travis on Docker
# choose the image according to the language chosen in .travis.yml
$ docker run -it -u travis quay.io/travisci/travis-jvm /bin/bash
# now that you are in the docker image, switch to the travis user
sudo — travis