Reduce min docker version to 20.10.0 (#861)

Follow up to 31931de

Docker 20.10.0 works for now so be less aggressive in forcing people to
upgrade.

Author: tgxworld

launcher

@@ -83,7 +83,7 @@ fi
 cd "$(dirname "$0")"
 
 pups_version='v1.0.3'
-docker_min_version='24.0.7'
+docker_min_version='20.10.0'
 docker_rec_version='24.0.7'
 git_min_version='1.8.0'
 git_rec_version='1.8.0'