Adoptium now called Eclipse Temurin and it seems a de-facto open source Java distro nowadays. I used to choose other distros, in particular Azul and Liberica (because Adoptium didn't run JCK tests at that time), but today I think there's no reason to choose anything but Temurin if you don't need paid support. They have docker images, including alpine one and arm64 one (not alpine arm64 sadly), they have macports package, what else one could wish.