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Update README.md

Update README.md #3

name: Build and Push Echo
on:
push:
branches: [ master ]
tags: [ 'v*' ]
pull_request:
branches: [ master ]
env:
REGISTRY: docker.io
IMAGE_NAME: echo
jobs:
build-and-push:
runs-on: ubuntu-latest
permissions:
contents: read
packages: write
steps:
- name: Checkout repository
uses: actions/checkout@v4
- name: Read version from file
id: version
run: |
if [ ! -f vars/version ]; then
echo "Error: vars/version file not found"
exit 1
fi
VERSION=$(cat vars/version)
if [[ ! $VERSION =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
echo "Error: Invalid version format. Expected format: v1.0.0"
echo "Current version: $VERSION"
exit 1
fi
echo "version=$VERSION" >> $GITHUB_OUTPUT
echo "Version validated: $VERSION"
- name: Set up Docker Buildx
uses: docker/setup-buildx-action@v3
- name: Login to Docker Hub
if: github.event_name != 'pull_request'
uses: docker/login-action@v3
with:
registry: ${{ env.REGISTRY }}
username: ${{ secrets.DOCKERHUB_USERNAME }}
password: ${{ secrets.DOCKERHUB_TOKEN }}
- name: Extract metadata
id: meta
uses: docker/metadata-action@v5
with:
images: ${{ env.REGISTRY }}/${{ secrets.DOCKERHUB_USERNAME }}/${{ env.IMAGE_NAME }}
tags: |
type=raw,value=${{ steps.version.outputs.version }}
type=raw,value=latest,enable={{is_default_branch}}
- name: Build and push Docker image
uses: docker/build-push-action@v5
with:
context: .
file: ./Dockerfile
platforms: linux/amd64,linux/arm64
push: ${{ github.event_name != 'pull_request' }}
tags: ${{ steps.meta.outputs.tags }}
labels: ${{ steps.meta.outputs.labels }}
cache-from: type=gha
cache-to: type=gha,mode=max