Fixes an edge case where a route without a path was causing the build to
fail. Reproducible with this `remix.config.js` file:
```js
export default {
ignoredRouteFiles: ["**/.*"],
routes(defineRoutes) {
return defineRoutes((route) => {
route("/", "foo.tsx", { index: true });
});
},
};
```
Changes the way that routes with optional params are stored on Vercel to not use `?` in the name, because it's not possible to have a route destination with a `?` that's pointing to a function.
So instead of the function with a name such as `:lang?`, it will be stored on Vercel with a name like `(:lang)`, which can be routed to.
Utilize the [`serverBundles`](https://github.com/remix-run/remix/pull/5479) config option to generate two server bundle builds. One contains only the routes that should run in Node.js, and the other contains only the routes that should run in the Edge runtime. In the future we could update this configuration to generate more than two bundles to be more granular and allow for infinite scalability.
Because the `serverBundles` PR is not yet merged, this PR introduces usage of a forked version of `@remix-run/dev` which incorporates our changes. Hopefully usage of a fork is temporary, but it gets us unblocked for now.
