This page explains how to migrate the headless from Mono to .NET 8.
No configuration changes are needed.
Baremetal
Before anything, make sure the .NET 8 runtime is installed.
You can then either start the headless by double-clicking on Resonite.exe (Windows only) or using the command dotnet Resonite.dll. This applies to scripts as well that needs to be modified.
Docker
You will need to switch to a .NET 8 base image, for instance mcr.microsoft.com/dotnet/runtime:8.0.
Then modify your CMD instruction to execute dotnet Resonite.dll.