Sample repository for elixir build on Drone with excoveralls.
You will need to add a coveralls_repo_token secret to the drone project to be able to report coverage:
export DRONE_TOKEN=<your-drone-token>
export DRONE_SERVER=<your-drone-server-hostname>
drone secret add --repository=namespace/project --name=coveralls_repo_token --value=<coveralls-repo-token>