Hello! I am migrating my project to a monorepo setup using the new Vercel Services Beta.

My project has an Express backend (packages/server/) and an Expo Web frontend (packages/client/).

Everything builds successfully and routes perfectly when clicking links from the home page. However, performing a browser refresh on a nested route (e.g. /c/1234) triggers a Vercel 404: NOT_FOUND error.

Here is my root vercel.json configuration:

1{2  "services": {3    "my_frontend": {4      "root": "packages/client/",5      "outputDirectory": "dist"6    },7    "my_backend": {8      "root": "packages/server/",9      "entrypoint": "src/index.ts"10    }11  },12  "rewrites": [13    { "source": "/api/(.*)", "destination": { "service": "my_backend" } },14    { "handle": "filesystem" },15    { 16      "source": "/((?!api).*)*", 17      "destination": { 18        "service": "my_frontend",19        "path": "index.html" 20      } 21    }22  ]23}

Any advice on how to correctly configure the SPA routing fallback for static service assets would be greatly appreciated!