It’s not currently possible to host files directly on the root directory of HubSpot hosted domains:
Derek_Gervais:
Hi @rlegrand, This isn’t possible with HubSpot-hosted domains because it’s not possible to host files at the root directory. That said, I can totally see the use case here. I’m happy to pass this along internally, but if you have the inclination I would encourage you to check out the Ideas Forum on the HubSpot Community. There, you can create a post including your use case that product and other customers can see.
Welcome, @K-Patel! At this time, files still cannot be hosted on the root domain, but the team is planning to release support for this in the near future! Stay tuned to the HubSpot Product Update Blog for current information.