Look at cloudbuild as a potential CI system?

[mithro]

• https://cloud.google.com/cloud-build/
• Generous free tier - Say goodbye to managing your own build servers with 120 free build-minutes per day and up to 10 concurrent builds included. Build-minutes are not incurred for the time a build is in queue.
• Extremely fast builds - Access machines connected via Google’s global network to significantly reduce your build time. Run builds on high-CPU VMs or cache source code, images, or other dependencies to further increase your build speed.