The following is a list of public Docker images Travis uses for our container based builds. You can grab them with docker pull quay.io/travisci/travis-$lang.
- Do note that they are large in size, 800MB - 1.8G
 
Images:
- https://quay.io/repository/travisci/travis-android
 - https://quay.io/repository/travisci/travis-erlang
 - https://quay.io/repository/travisci/travis-go
 - https://quay.io/repository/travisci/travis-haskell
 - https://quay.io/repository/travisci/travis-jvm
 - https://quay.io/repository/travisci/travis-node-js
 - https://quay.io/repository/travisci/travis-perl
 - https://quay.io/repository/travisci/travis-php
 - https://quay.io/repository/travisci/travis-python
 - https://quay.io/repository/travisci/travis-ruby