apt-key is deprecated (Docker building)

[veredCyto]

Hi, while trying to build the docker image for CKG i got an error messege: "ERROR: failed to solve: process "/bin/sh -c apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 51716619E084DAB9" did not complete successfully: exit code: 2" I think this is because apt-key command is deprecated. Can you update the DockerFile with an updated command? Thanks.