Add GitHub Actions workflow for building and pushing Docker images to GHCR

Author: ericbusboom

.github/workflows/docker-publish.yml

@@ -0,0 +1,69 @@
+name: Build and Push to GHCR
+
+on:
+  push:
+    #branches:
+    #  - master
+    
+    # Publish semver tags as releases.
+    tags: [ 'v*.*.*' ]
+  pull_request:
+    branches: [ "master" ]
+
+env:
+  # Use docker.io for Docker Hub if empty
+  REGISTRY: ghcr.io
+  # github.repository as <account>/<repo>
+  IMAGE_NAME: ${{ github.repository }}
+  ORG_NAME: league-infrastructure
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      attestations: write
+      id-token: write
+
+    steps:
+      # Step 1: Check out the repository
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      # Step 2: Install devcontainers CLI
+      - name: Install devcontainers CLI
+        run: npm install -g @devcontainers/cli
+
+      # Step 3: Log in to GitHub Container Registry
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set Image Tag
+        id: image_tag
+        run: |
+          TAG=$(echo "${GITHUB_REF}" | sed 's|refs/tags/||')
+          echo "TAG=${TAG}" >> $GITHUB_ENV
+          echo "LATEST_TAG=true" >> $GITHUB_ENV
+        shell: bash
+
+      # Step 4: Build the Dev Container image
+      - name: Build Dev Container image
+        run: |
+          devcontainer build --workspace-folder . --image-name ${{ env.REGISTRY }}/${{ env.ORG_NAME }}/${{ env.IMAGE_NAME }}:${{ env.TAG }}
+
+      # Step 5: Tag image as latest
+      - name: Tag image as latest
+        run: |
+          docker tag ${{ env.REGISTRY }}/${{ env.ORG_NAME }}/${{ env.IMAGE_NAME }}:${{ env.TAG }} \
+                     ${{ env.REGISTRY }}/${{ env.ORG_NAME }}/${{ env.IMAGE_NAME }}:latest
+
+      # Step 6: Push Docker image
+      - name: Push Docker image
+        run: |
+          docker push ${{ env.REGISTRY }}/${{ env.ORG_NAME }}/${{ env.IMAGE_NAME }}:${{ env.TAG }}
+          docker push ${{ env.REGISTRY }}/${{ env.ORG_NAME }}/${{ env.IMAGE_NAME }}:latest