One is able to host Pocketbase on Railway.app. This deployment is based on Docker Image. You need a GitHub account.
1. Create an account on Railway.app and link to your Github.
2. Click this link to publish a PocketBase instance on port 8090 there...
By default, after configuring PocketBase, i.e. the SQLite WebServer, it can run on port 8090 when you start it and use it for your back-ends.
I have just learned that you can run multiple instances of PocketBase on the same machine and on different ports.