update documentation for 1.2.3

echo "building Docker container version $version"

docker build -t universc:$version .

docker tag  universc:$version universc:latest

docker tag universc:$version tomkellygenetics/universc:latest

docker tag universc:$version tomkellygenetics/universc:$version

docker tag universc:$version docker.io/tomkellygenetics/universc:latest

docker tag universc:$version docker.io/tomkellygenetics/universc:$version

docker push tomkellygenetics/universc:latest

docker push tomkellygenetics/universc:$version

tag universc:$version docker.pkg.github.com/minoda-lab/universc/universc:$version