Tidying

templates/watchtower/_common.sh

@@ -63,6 +63,10 @@ grey_end() {
 }
 
 create_and_start_container() {
+    if [ -z "$1" ] || [ -z "$2" ]; then
+        die "Template error: create_and_start_container <run_cmd> <container_name>"
+    fi
+
     local run_cmd="$1"
     local container_name="$2"