How can I tag Docker images in CircleCI?

How can I tag Docker images in CircleCI?

You can tag Docker images in CircleCI by using the docker command in your configuration file. You typically specify the tag in the docker build command.

Can you show me an example of the configuration?

Sure! Here's a simple example:

version: 2.1
jobs:
  build:
    docker:
      - image: circleci/python:3.8
    steps:
      - checkout
      - run:
          name: Build and Tag Docker Image
          command: |
            docker build -t my-image:${CIRCLE_SHA1} .

What does ${CIRCLE_SHA1} represent?

${CIRCLE_SHA1} is an environment variable in CircleCI that contains the commit SHA of the current build, which helps in uniquely tagging your Docker images.

Can I use other tags besides the commit SHA?

Yes, you can use any string as a tag. For example, you can use version numbers or branch names to tag your images.