Having importing the repo for the Hugo theme Introduction from GitHub to GitLab, I added the automatically generated GitLab CI config file and I ran job #135854407.
$ cd exampleSite
$ hugo --themesDir=../.. -d ../public
hugo: /usr/lib/libstdc++.so.6: no version information available (required by hugo)
hugo: /usr/lib/libstdc++.so.6: no version information available (required by hugo)
The build succeeded with the above message. To suppress it, a switch to another CI runner will do. The associated GitLab CI config file was copied from Hugo’s documentation with some customizations for Hugo sample sites