Test all the things in GitLab CI with Docker by example

This post introduces the concept of using Docker within GitLab CI/CD to automate testing for various components, including Node.js, Django, and Unity3D. It provides practical examples and links to sample projects, demonstrating how to set up CI pipelines to test different technologies. The post also highlights the benefits of GitLab's free tier for CI build minutes and provides useful links to GitLab CI/CD documentation and linting tools.