CircleCI makes it easy to get started with a free tier and great documentation for beginners and pros alike. If you have unique enterprise needs, CircleCI can be brought on premise, behind corporate firewalls, or as a private deployment in the cloud.

CircleCI has pre-baked build environments for virtual configuration of free setups, but it can also run builds using Docker containers, making it a solution that scales to user skills and needs, as mentioned in the Containerizing Build Environment section:

  1. Create a CircleCI account at
  2. Sign up with GitHub:
CircleCI Sign up page
  1. Add a new project:
CircleCI Projects ...

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