Make ntfy run as ntfy user/group, closes #38

scripts/postrm.sh

@@ -3,6 +3,8 @@ set -e
 
 # Delete the config if package is purged
 if [ "$1" = "purge" ]; then
-  echo "Deleting /etc/ntfy ..."
-  rm -rf /etc/ntfy || true
+  id ntfy >/dev/null 2>&1 && userdel ntfy
+  rm -f /etc/ntfy/config.yml
+  rmdir /etc/ntfy || true
 fi
+