feat: some progress on new CI/CD pipeline

3 jobs for 16-deploy-to-staticpages-vm in 21 seconds (queued for 1 second)
Name Stage Failure
build_pages Build
url: https://R3.pages.uni.lu\nbaseurl: /howto-cards
$ bundle exec jekyll build -d build --config "_config.yml,_config_$CI_COMMIT_REF_NAME.yml"
Configuration file: /builds/R3/howto-cards/_config.yml
Jekyll 4.0.0 Please append `--trace` to the `build` command
for any additional information or backtrace.
ERROR: Job failed: exit code 1