ci(web): add job to validate nginx config

Author: franzramadhan

.github/workflows/ci-web.yml

@@ -1,6 +1,13 @@
 on:
   workflow_call:
 jobs:
+  nginx-config-validation:
+    name: nginx-config-validation
+    runs-on: ubuntu-latest
+    with:
+      template_directory: docker
+      template_values: '{"PORT": 8080, "REAL_IP_HEADER": "X-Forwarded-For"}'
+      working_directory: web
   ci:
     name: ci
     runs-on: ubuntu-latest