message: Update trigger_docker_build.sh
  Made docker token pirvate.
diff: -curl -H "Content-Type: application/json" --data '{"build": true}' -X POST https://registry.hub.docker.com/u/xd009642/tarpaulin/trigger/e50f3cfc-8c09-4ca1-bdd7-d4b8789e820a/
  +curl -H "Content-Type: application/json" --data '{"build": true}' -X POST https://registry.hub.docker.com/u/xd009642/tarpaulin/trigger/$DOCKER_TOKEN/
  