add generate index script

4 jobs for develop in 3 minutes and 15 seconds (queued for 1 second)
Name Stage Failure
failed
build the website Build

Skipping Git submodules setup
Authenticating with credentials from job payload (GitLab Registry)
/bin/bash: line 94: cd: courses.lcsb.uni.lu: No such file or directory
$ cd courses.lcsb.uni.lu
Running after script...
$ mv site ../.
mv: cannot stat 'site': No such file or directory
ERROR: Job failed: exit code 1
failed
build index Build
Removing 2020/2020-06-09_IT101-DM/public/
Removing 2020/2020-06-09_IT101-DM/theme
Removing 2020/2020-06-09_IT101-DM/yarn.lock
Removing public/

Skipping Git submodules setup
$ git clone https://git-r3lab.uni.lu/R3/school/courses.lcsb.uni.lu.git courses.lcsb.uni.lu
/bin/sh: eval: line 89: git: not found
ERROR: Job failed: exit code 127