feat(validate): add check mode test

.github/workflows/test.yaml

@@ -24,4 +24,20 @@ jobs:
           haproxy -vv
 
       - name: Test
-        run: go run mage.go test
+        run: go run mage.go test
+
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.23'
+
+      - name: Build binary
+        run: go run mage.go build
+
+      - name: Check config
+        run: ./coraza-spoa -c -f ./example/coraza-spoa.yaml