Docker-Opengrok : Host opengrok on Docker. How to build opengrok with ubuntu container $ docker build -t ranjithum/opengrok-ubuntu -f Dockerfile.ubuntu . How to build opengrok with centos8 container $ docker build -t ranjithum/opengrok-centos -f Dockerfile.centos . How to tag a image $ docker tag <Iamge-Id> ranjithum/opengrok:centos8 $ docker tag <Iamge-Id> ranjithum/opengrok:ubuntu18 Push the image to docker hub $ docker login docker.io $ docker push ranjithum/opengrok:centos8 $ docker push ranjithum/opengrok:ubuntu18