Add CORS tests

And move the CORS handler only on the homepage endpoint.
3 jobs for redirect-307 in 2 minutes and 50 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Build Pkgsrc
passed build_pkgsrc:stretch #9269

00:00:19

 
  Build Pkg
passed build_pkg:stretch:amd64 #9270
amd64

00:00:59

passed build_pkg:stretch:arm64 #9271
arm64

00:02:29