Auth0 offers the possibility to use external databases to store the created user accounts. Do we have a Chance to connect MongoDB realm also in this respect with Auth0? More Informations here: https://auth0.com/docs/connections/database#using-your-own-user-store
Since you can connect it to MongoDB you can connect it to Atlas cluster I believe but this needs to be tested. Perhaps you can even use the wire protocol and its realm connection string to do a direct realm store.
Its possible to host a nodejs app with realm hosting? I thought only static or single page applications are supported
Well depands on what you define as an app and its purpose.
I think with webpack you should be able to create a deployable application
I once blogged about stitch hosting and it has the same mechanism just rebrand to realm:
Thanks
Pavel