Ubuntu kernel 4.15.0-60-generic seems to be broken with Docker and --dns flags, do NOT use it!

update.sh

@@ -6,6 +6,12 @@ if [ "$(id -u)" -ne "0" ]; then
   exit 1
 fi
 
+if [[ "$(uname -r)" =~ ^4\.15\.0-60 ]]; then
+  echo "DO NOT RUN mailcow ON THIS UBUNTU KERNEL!";
+  echo "Please update to 5.x or use another distribution."
+  exit 1
+fi
+
 # Exit on error and pipefail
 set -o pipefail