add validation

.github/workflows/update-server.yml

@@ -2,7 +2,23 @@ name: update neo with compose files
 run-name: update on ${{ github.sha }}
 on: [push]
 jobs:
+  validate:
+    runs-on: ubuntu-latest
+    steps:
+      - name: install docker-compose
+        run: |
+          apt update -y
+          apt install docker-compose
+      - name: check docker-compose
+        run: |
+          cd ${{ github.workspace }}
+          DC_ARGS=""
+          for $f in docker-compose.*.yml; do
+            DC_ARGS="-f $f"
+          done
+          docker-compose $DC_ARGS config
   update:
+    needs: [validate]
     runs-on: ubuntu-latest
     steps:
       - name: setup ssh