Merge branch 'update-contributing-and-license' into 'master'

Add contributing guide and license

See merge request !2
3 jobs for master in 3 minutes and 26 seconds (queued for 15 seconds)
latest
Status Job ID Name Coverage
  Build
passed #40205517
docker shared
build

00:01:36

 
  Test
passed #40205518
docker shared
test

00:00:51

 
  Deploy
passed #40205519
docker shared
deploy

00:00:57