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name: Create and publish a Docker image

on:

push:

branches: ['release']

env:

REGISTRY: ghcr.io

IMAGE_NAME: ${{ github.repository }}

jobs:

build-and-push-image:

runs-on: ubuntu-latest

permissions:

contents: read

packages: write

steps:

- name: Checkout repository

uses: actions/checkout@v4

# Uses the `docker/login-action` action to log in to the Container registry registry using the account and password that will publish the packages. Once published, the packages are scoped to the account defined here.

- name: Log in to the Container registry

uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1

with:

registry: ${{ env.REGISTRY }}

username: ${{ github.actor }}

password: ${{ secrets.GITHUB_TOKEN }}

# This step uses [docker/metadata-action](https://github.com/docker/metadata-action#about) to extract tags and labels that will be applied to the specified image. The `id` "meta" allows the output of this step to be referenced in a subsequent step. The `images` value provides the base name for the tags and labels.

- name: Extract metadata (tags, labels) for Docker

id: meta

uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7

with:

images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

# This step uses the `docker/build-push-action` action to build the image, based on your repository's `Dockerfile`. If the build succeeds, it pushes the image to GitHub Packages.

# It uses the `context` parameter to define the build's context as the set of files located in the specified path. For more information, see "[Usage](https://github.com/docker/build-push-action#usage)" in the README of the `docker/build-push-action` repository.

# It uses the `tags` and `labels` parameters to tag and label the image with the output from the "meta" step.

- name: Build and push Docker image

uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4

with:

context: .

push: true

tags: ${{ steps.meta.outputs.tags }}

labels: ${{ steps.meta.outputs.labels }}