Atlantis

A standalone path through Atlantis, which brings a GitOps workflow to Terraform: plans run automatically on pull requests, applies happen from a comment after review, and state is locked so two PRs cannot collide. Beginner covers the model, running the server, the PR workflow, and locking. Intermediate builds real usage: atlantis.yaml projects, workflows and multi-directory repos, autoplan and custom steps, and policy checks with Conftest. Advanced goes deep: server-side config and workflow control, secrets and credentials, hardening the Atlantis server, and comparing GitOps approaches. Real config and PR output throughout; each level ends with a self-test feeding a rotating final exam.