GitlabCI run pipeline on specific branch and manual

 Ref: https://stackoverflow.com/questions/51642852/gitlabci-run-pipeline-on-specific-branch-and-manual

You want to run the builds on branch develop automatically but in branch web manually

You can't do this in one build, but you can use two builds for it:

my_build:develop
  stage: build
  only:
    - develop

my_build:web
  stage: build
  only:
    - web
  when: manual