I'm using Kamal for a Ruby on Rails app on a dedicated server on Hetzner. Works like a charm! Did you find it difficult to deploy a .NET, because of the documentation oriented more towards Rails?
Took a bit of research and trial and error to get to a solution we liked, but as it's just deploying and managing Docker Apps, deploying .NET Docker Apps was ok but a bit of time was spent supporting DB Migrations and litestream and running it from GitHub Actions, we've documented our support for Deploying with Kamal (inc YouTube Guide) at: