fix: use correct position for the ARG line

Author: rambo

Dockerfile

@@ -1,5 +1,4 @@
 # syntax=docker/dockerfile:1.1.7-experimental
-ARG RUNE_TAG="v1.0.6"
 
 #############################################
 # Tox testsuite for multiple python version #
@@ -22,6 +21,7 @@ RUN export RESOLVED_VERSIONS=`pyenv_resolve $PYTHON_VERSIONS` \
 # Base builder image #
 ######################
 FROM python:3.11-bookworm as builder_base
+ARG RUNE_TAG="v1.0.6"
 
 ENV \
   # locale
@@ -75,7 +75,8 @@ RUN --mount=type=ssh pip3 install wheel virtualenv \
 
 # Add rune instructions
 RUN mkdir -p /opt/templates \
-    && curl -L https://github.com/pvarki/rune-fake-metadata/releases/download/$RUNE_TAG/rune.json -o /opt/templates/rune-fake.json
+    && curl -L https://github.com/pvarki/rune-fake-metadata/releases/download/${RUNE_TAG}/rune.json -o /opt/templates/rune-fake.json \
+    && ls -lah /opt/templates/rune-fake.json
 
 ####################################
 # Base stage for production builds #