Dockerizing multi-git

Uploading the multi-git image to DockerHub

So far, we’ve built a local Docker image, but, if we want to share our work with other users we need to upload our Docker images to an image registry. Every cloud provider has an image registry, but I’ll use the defaultDockerHub from Docker. To upload (or push in docker nomenclature) an image, you need an account. My account name is g1g1. To push an image to the DockerHub registry, it needs to be tagged with the account name. There is no need to rebuild. We can tag the existing image:

(🐙)/multi-git/
$ docker tag multi-git:latest g1g1/multi-git:latest

(🐙)/multi-git/
$ docker images --format "{{.ID}} {{.Repository}}" | grep multi-git$
517c0cc344f3 g1g1/multi-git
517c0cc344f3 multi-git

As you can see, the same image ID has two repositories: multi-git (local) and g1g1/multi-git (DockerHub). Now, we can login and push the image:

(🐙)/multi-git/
$ docker login
Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
Username: g1g1
Password: ********
Login Succeeded

(🐙)/multi-git/
$ docker push

...