Hi Leo,
As from discussion from late last year, see here, it doesn’t seem that it is available as of now (?). If there is a docker file (somwhere?) then you could try to emulate those commands in a bash shell. It is certainly not on ppa yet. Though Cecile may be able to comment more on that.
Alternatively for running scripts using the mixed dimensional branch on a HPC cluster I pushed a container on Singularity here.
Cheers,
Bhavesh