make sure we pass the correct arguments

Author: zaherg

Dockerfile

@@ -1,5 +1,8 @@
 FROM php:7.1-fpm-alpine
 
+ARG BUILD_DATE
+ARG VCS_REF
+
 LABEL Maintainer="Zaher Ghaibeh <z@zah.me>" \
  Description="Lightweight php 7.1 container based on alpine with xDebug enabled, SOPAP extensions enabled & composer installed." \
  org.label-schema.name="php-7.1-xdebug-alpine" \