From 1. 4., DockerHub introduces new very strict rate limitations on docker image pulls.
Consider changing FROM tags in dockerfiles to use altenative providers or add login step at the beginning of CI/CD job as authenticated requests aren't affected.
Jobs are the building blocks of a GitLab CI/CD pipeline. Each job has a specific task, like testing code. To set up jobs in a CI/CD pipeline, add a CI/CD configuration file to your project.