To build image:

docker build .

To log in to docker:

docker login --username yforster

Manually:

docker build .
docker images
docker tag <latest ID from docker images> yforster/coq:8.16.1--clang-11--compcert-3.11--extlib-0.11.8--equations-1.3--elpi.1.16
docker push yforster/coq:8.16.1--clang-11--compcert-3.11--extlib-0.11.8--equations-1.3--elpi.1.16

Automatically, copy-paste the output of

../push-current.sh