ci: add github actions workflow for docker build and push

Author: mpnikhil

.github/workflows/docker-publish.yml

@@ -0,0 +1,84 @@
+name: Build and Push Docker Images
+
+on:
+  push:
+    branches: [ "main", "fix/mcp-docstrings" ]
+    tags: [ 'v*.*.*' ]
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: 'Tag to use for the images (defaults to latest)'
+        required: false
+        default: 'latest'
+
+env:
+  REGISTRY: ghcr.io
+  # Use github.repository_owner to dynamically handle the namespace (e.g., mpnikhil)
+  IMAGE_PREFIX: ghcr.io/${{ github.repository_owner }}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log into registry ${{ env.REGISTRY }}
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Green Agent
+        id: meta-green
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.IMAGE_PREFIX }}/webshop-plus-green
+          tags: |
+            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', github.event.repository.default_branch) }}
+            type=raw,value=${{ github.event.inputs.tag }},enable=${{ github.event_name == 'workflow_dispatch' && github.event.inputs.tag != '' }}
+            type=ref,event=branch
+            type=ref,event=tag
+            type=sha
+
+      - name: Build and push Green Agent
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: green_agent/Dockerfile
+          push: true
+          tags: ${{ steps.meta-green.outputs.tags }}
+          labels: ${{ steps.meta-green.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Extract metadata (tags, labels) for Purple Agent
+        id: meta-purple
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.IMAGE_PREFIX }}/webshop-plus-purple
+          tags: |
+            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', github.event.repository.default_branch) }}
+            type=raw,value=${{ github.event.inputs.tag }},enable=${{ github.event_name == 'workflow_dispatch' && github.event.inputs.tag != '' }}
+            type=ref,event=branch
+            type=ref,event=tag
+            type=sha
+
+      - name: Build and push Purple Agent
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: purple_agent/Dockerfile
+          push: true
+          tags: ${{ steps.meta-purple.outputs.tags }}
+          labels: ${{ steps.meta-purple.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

build_and_push.sh

@@ -32,6 +32,13 @@ done
 
 echo "==> Building WebShop+ images (version: $VERSION)"
 
+if [ "$PUSH" = true ]; then
+  echo "⚠️  Note: Pushing images from a local machine (especially ARM Macs) can be very slow."
+  echo "   It is highly recommended to use the GitHub Actions workflow instead."
+  echo "   See .github/workflows/docker-publish.yml or DOCKER_WORKFLOW.md for details."
+  echo ""
+fi
+
 # Determine platform
 PLATFORM="linux/amd64"
 if [ "$PUSH" = false ]; then