@ellmetha are you still using it?
I've had second thoughts about the usefulness of creating lxdock. Sure LXD isn't supported on vagrant (there's a new vagrant-lxd plugin but it doesn't look like it works well), but I've been working directly with LXC and vagrant-lxc recently and, as a matter of fact, it works rather well.
Sure, the whole "box management" part is tricky with LXC/LXD and a vagrant-lxc user has to create her own boxes. Sure, LXC is hard to set up properly. But as long as vagrant has the virtualbox fallback driver, that doesn't matter much: users will go through complicated setups if they need the speed.
Also, I don't like the idea of using the LXD layer when I don't need it. Also, building Go stuff is a PITA on Gentoo.
I think I'd rather spend my time on vagrant-lxc (it doesn't support unprivileged containers yet).
Since I don't see activity on your side either, does that mean that lxdock became unmaintained? If so, we should indicate it in the README. Someone might want to pick it up.