How to migrate from Bamboo to GitLab CI/CD

This post details the technical steps and considerations for migrating CI/CD workflows from Bamboo to GitLab CI/CD. It explains the differences in organization (Projects/Plans vs. single platform with `.gitlab-ci.yml`), agents vs. runners, and Bamboo Specs vs. `.gitlab-ci.yml`. It provides direct code examples for converting container image definitions, stages, variables, and build jobs. It also highlights GitLab's additional features like application security, compliance policies, CI/CD catalog, and package/container registries that enhance the CI/CD workflow beyond basic build and deployment.