But none of this is Linux: JSLinux runs an x86 emulator build using emscripten (https://bellard.org/jslinux/tech.html), with enough hardware emulated (including a 9P filesystem and a VirtIO block device) to make the whole thing possible. I've not tested this, but I wouldn't be surprised if you could get docker containers or even kubernetes running on it (given all the syscalls should be there).