Avoid text file busy prior to exec sudo

minecraft-server/start.sh

@@ -4,5 +4,9 @@ set -e
 usermod --uid $UID minecraft
 chown -R minecraft /data /start-minecraft
 
+while lsof -- /start-minecraft; do
+  echo -n "."
+  sleep 1
+done
+echo "...switching to user 'minecraft'"
 exec sudo -E -u minecraft /start-minecraft
-