Some enhancements in the README + fix the page job in the CI

4 jobs for master in 5 minutes and 3 seconds (queued for 2 seconds)
Name Stage Failure
failed
pages Deploy
Selecting previously unselected package tree.
(Reading database ... (Reading database ... 5% (Reading database ... 10% (Reading database ... 15% (Reading database ... 20% (Reading database ... 25% (Reading database ... 30% (Reading database ... 35% (Reading database ... 40% (Reading database ... 45% (Reading database ... 50% (Reading database ... 55% (Reading database ... 60% (Reading database ... 65% (Reading database ... 70% (Reading database ... 75% (Reading database ... 80% (Reading database ... 85% (Reading database ... 90% (Reading database ... 95% (Reading database ... 100% (Reading database ... 4046 files and directories currently installed.)
Preparing to unpack .../tree_1.7.0-5_amd64.deb ...
Unpacking tree (1.7.0-5) ...
Setting up tree (1.7.0-5) ...
$ mkdir .public
$ cp -rf result .public/
cp: cannot stat 'result': No such file or directory
ERROR: Job failed: exit code 1