Run linter in container-release workflow

.github/workflows/container-release.yml

@@ -23,6 +23,14 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v2
+        
+      - name: Run lint
+        run: |
+          if ! crystal tool format --check; then
+            crystal tool format
+            git diff
+            exit 1
+          fi
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v1
@@ -61,4 +69,4 @@ jobs:
           labels: quay.expires-after=12w
           push: true
           tags: quay.io/invidious/invidious:${{ github.sha }}-arm64,quay.io/invidious/invidious:latest-arm64
-          build-args: release=1
+          build-args: release=1