Linux
DevCapsule ships as a Linux, Intel/AMD 64-bit executable and needs Docker Engine with Buildx, working as your ordinary user, and a web browser. That is the whole requirement; Install checks it in three commands. ARM Linux is not covered by this release.
The project is developed and released on Ubuntu-family desktops with Docker Engine from Docker's own repository. Other distributions with a current Docker Engine are expected to work and are not individually verified; if yours does not, an issue with the distribution and the error is welcome.