facepalm; fixed the env issue

.github/workflows/update-server.yml

@@ -14,11 +14,9 @@ jobs:
       - name: validate files
         run: |
           set -e
-          ls ${{github.workspace}}
-          ls .
           DC_ARGS=""
           for file in docker-compose.*.yml; do
-            DC_ARGS="-f $file "
+            DC_ARGS="$DC_ARGS -f $file"
           done
           echo $DC_ARGS
           docker-compose $DC_ARGS config -q