Dockerfile: Update for gb
Dockerfile: Update for gb

mappu/restic,jayme-github/restic,bchapuis/restic,middelink/restic,ckemper67/restic,restic/restic,arithmetric/restic,stuertz/restic,middelink/restic,kurin/restic,fawick/restic,stuertz/restic,kurin/restic,restic/restic,byo/restic,jayme-github/restic,fawick/restic,ar-jan/restic,byo/restic,ar-jan/restic