chore: add vercel.json for Angular deployment

vercel.json

@@ -0,0 +1,19 @@
+{
+    "framework": null,
+    "buildCommand": "cd frontend && npm install && npm run build",
+    "outputDirectory": "frontend/dist/frontend/browser",
+    "routes": [
+        {
+            "src": "/assets/(.*)",
+            "dest": "/assets/$1"
+        },
+        {
+            "src": "/(.*\\.(js|css|ico|png|jpg|jpeg|svg|woff|woff2|ttf|eot))",
+            "dest": "/$1"
+        },
+        {
+            "src": "/(.*)",
+            "dest": "/index.html"
+        }
+    ]
+}