Define ARGs within the FROM

Author: eflumerf

dockerfiles/artdaq-spack.dockerfile

@@ -1,13 +1,14 @@
 # This Dockerfile is used to create an artdaq build area for Github Actions CI
 
+ARG BASE_IMAGE=eflumerf/alma9-spack:latest
+
+FROM ${BASE_IMAGE} AS intermediate
+
 ARG ARTDAQ_AREA=artdaq-v4_05_00
 ARG ART_AREA=art-suite-s132.1
-ARG BASE_IMAGE=eflumerf/alma9-spack:latest
 ARG SPACK_VERSION=v0.28
 ARG SCRIPT_NAME=quick-spack-start_${SPACK_VERSION}.sh
 
-FROM ${BASE_IMAGE} AS intermediate
-
 SHELL ["/bin/bash", "-c"]
 
 WORKDIR /opt/artdaq