Abort on errors in chroot-and-tar.sh when building judgehost docker image

Author: tom93

docker/judgehost/chroot-and-tar.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
 
+set -euo pipefail
+
 # Usage: https://github.com/DOMjudge/domjudge/blob/main/misc-tools/dj_make_chroot.in#L58-L87
 /opt/domjudge/judgehost/bin/dj_make_chroot