How to include a private Gitlab repository into composer

1. Setup the repository as a dependency in composer.json:

   "repositories": [
       {
   ...
       },
       {
         "type": "gitlab",
         "url": "https://gitlab.fftrader.cz/some/project.git"
       }
     ],
   

2. Create a project access token. Needs at least reporter level. DO NOT USE guest
3. Add the token to Gitlab CI/CD variables as eg. GITLAB_TOKEN
4. Send the token as a build-arg to Podman / Docker:

   podman build .. --no-cache --pull --build-arg GITLAB_TOKEN=$GITLAB_TOKEN
   

5. In the Dockerfile do this:

   ARG GITLAB_TOKEN
   RUN composer config gitlab-domains gitlab.fftrader.cz && \
       composer config gitlab-token.gitlab.fftrader.cz $GITLAB_TOKEN && \
   

6. ...
7. Profit