Use bash for upgrade script

upgrade/Traefik.sh

@@ -97,7 +97,7 @@ find /home/dockerweb -name "docker-compose.yml" | while read file; do
         docker-compose up -d
         if [ -e "upgrade.sh" ] && [ -x "upgrade.sh" ] ; then
             echo "Running upgrade script for $dir"
-            ./upgrade.sh
+            bash upgrade.sh
             echo "Done $?"
         fi
     fi