How to pass github action's variable into Dockerfile

Image Builds
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Hi All, need help-
I want pass environment variable (value) from Git Action’s deployment.yaml to dockerfile", is that something I can do ? Basically I have a python script which has static value given for AWS secret, I want to make it dynamic based on the environment(stage, prod, etc…). I have an Environment variable defined in deploy.yaml in github actions workflow, I want to pass that environment value into dockerfile . Can i do that ? Any guidance would be a great help

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So basically the question is how to configure the GitHub Action to pass the variables into the build.

The docker perspective is quite simple: declare ARG instructions in your Dockerfile, and pass their values in with build args. See: https://docs.docker.com/reference/dockerfile/#arg

Now you need to figure out how to configure the GitHub Action to pass the build args into the build.

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Hello,

In GitHub Actions, pass build arguments (ARG) to the Docker build using build-args in docker/build-push-action:

- name: Build and push Docker image
  uses: docker/build-push-action@v5
  with:
    context: .
    push: true
    tags: your-dockerhub-username/your-image-name:latest
    build-args: |
      API_URL=${{ secrets.API_URL }}
      NEXT_PUBLIC_API_KEY=${{ secrets.NEXT_PUBLIC_API_KEY }}

Add secrets in GitHub Settings → Actions → Secrets and variables.

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