how do I tell FileRoutes to look for a folder other than `routes`?

I have a solid start node instance handling multiple domains
this means I need multiple

<FileRoutes/>

<FileRoutes/>

configured with different

routes

routes

folders and then on request look at the domain and use the associated

<FileRoutes/>

<FileRoutes/>

for that domain

how do I tell FileRoutes to look for a folder other than `routes`? - SolidJS