Build an Image with Docker and Push to a Container Registry

Build an Image with Docker and Push it to a Container Registry

Prereqs:

• Docker is installed and running on your machine
  • Check with docker --version
  • Get fancy with docker info
• Build an app and create a Dockerfile

How to do it

1. Create a Docker image

• In the directory for your app run

  docker build -t <nameofimage> .

2. Test that it's working by creating a container locally

   docker run -p 4000:80 <nameofimage>

3. Login in your registry

• For Dockerhub: docker login
• For DOCR: doctl registry login

4. Tag your image with your registry and repo name

   docker tag <my-image> registry.digitalocean.com/<my-registry>/<my-image>:tag

5. Upload your image to your registry

   docker push registry.digitalocean.com/<my-registry>/<my-image>

6. Repeat and update the tag when a change is made

7. Have a cookie.