How do I push a Docker image to CircleCI?

How do I push a Docker image to CircleCI?

To push a Docker image to CircleCI, you need to configure your CircleCI config file to include the Docker image build and push steps.

What should I include in my .circleci/config.yml file?

You should include a job that builds your Docker image and a step that uses the 'docker/push' command to push it to your registry.

Can you give me an example of the config file?

Sure! Here's a basic example:

version: 2.1
jobs:
  build:
    docker:
      - image: circleci/python:3.8
    steps:
      - checkout
      - setup_remote_docker:
          version: 20.10.7
          docker_layer_caching: true
      - run:
          name: Build Docker image
          command: docker build -t my-image:latest .
      - run:
          name: Push Docker image
          command: docker push my-image:latest
workflows:
  version: 2
  build_and_push:
    jobs:
      - build

What if I want to use a private Docker registry?

You can use the 'docker/login' command in your config file to authenticate with your private registry before pushing the image.