feat: add GitHub Actions workflow for building and publishing Docker images

Author: CasLubbers

.github/workflows/build-and-push.yml

@@ -0,0 +1,119 @@
+name: Build and publish Docker
+on:
+  push:
+    branches:
+      - '**'
+    tags-ignore:
+      - '*'
+  workflow_dispatch: ~
+env:
+  CACHE_REGISTRY: ghcr.io
+  CACHE_REPO: linode/apl-nodejs-helloworld
+  REPO: linode/apl-nodejs-helloworld
+  DOCKER_PASSWORD: ${{ secrets.DOCKERHUB_LINODEBOT_TOKEN }}
+  DOCKER_USERNAME: ${{ vars.DOCKERHUB_LINODEBOT_USERNAME }}
+  BOT_EMAIL: ${{ vars.BOT_EMAIL }}
+  BOT_USERNAME: ${{ vars.BOT_USERNAME }}
+  COMMIT_SHA: ${{ github.sha }}
+
+jobs:
+  build-test-cache:
+    if: (!contains(github.event.head_commit.message, 'ci skip') && !startsWith(github.ref, 'refs/tags/') && !github.event.act)
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Set env
+        run: |
+          tag=${GITHUB_REF##*/}
+          echo "Creating tag: $tag"
+          echo "TAG=$tag" >> $GITHUB_ENV
+          if [[ "${{ github.ref }}" == "refs/heads/main" ]]; then
+            revision=${{ env.COMMIT_SHA }}
+            echo "Setting apps revision to: $revision"
+            echo "APPS_REVISION=$revision" >> $GITHUB_ENV
+          else
+            echo "Leaving apps revision empty"
+          fi
+          git config --global user.email $BOT_EMAIL
+          git config --global user.name $BOT_USERNAME
+
+      - name: Checkout
+        uses: actions/checkout@v6
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Login to Github Packages
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.CACHE_REGISTRY }}
+          username: ${{ env.BOT_USERNAME }}
+          password: '${{ secrets.BOT_TOKEN }}'
+      - name: CI tests, image build and push tag for main or branch
+        uses: docker/build-push-action@v6
+        with:
+          push: true
+          build-args: |
+            APPS_REVISION=${{ env.APPS_REVISION }}
+          context: .
+          tags: |
+            ${{ env.CACHE_REGISTRY }}/${{ env.CACHE_REPO }}:${{ env.TAG }}
+
+  push-to-docker:
+    needs: build-test-cache
+    if: always() && ((contains(needs.build-test-cache.result, 'success') && !contains(needs.integration.outputs.started, 'true')) || (contains(needs.integration.result, 'success'))) && !github.event.act && github.actor != 'dependabot[bot]'
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Push to docker hub
+        run: |
+          set -u
+          TAG=${GITHUB_REF##*/}
+          docker login ghcr.io -u $BOT_USERNAME -p ${{ secrets.BOT_TOKEN }}
+          image="$CACHE_REGISTRY/$CACHE_REPO:$TAG"
+          docker pull $image
+          docker tag $image $REPO:$TAG
+          docker login -u $DOCKER_USERNAME -p $DOCKER_PASSWORD
+          docker push $REPO:$TAG
+      - name: Show me the logic
+        run: |
+          echo github.ref == ${{ github.ref }}
+
+  release:
+    needs: push-to-docker
+    if: always() && (startsWith(github.ref, 'refs/heads/releases/') || startsWith(github.ref, 'refs/heads/main')) && startsWith(github.event.head_commit.message, 'chore(release)') && !github.event.act
+    runs-on: ubuntu-22.04
+    env:
+      COMMIT_MSG: ${{ github.event.head_commit.message }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+      - name: Set env
+        run: |
+          git config --global user.email $BOT_EMAIL
+          git config --global user.name $BOT_USERNAME
+      - name: Create and push git tag
+        id: git_tag
+        run: |
+          TAG=${GITHUB_REF##*/}
+          docker login -u $DOCKER_USERNAME -p $DOCKER_PASSWORD
+          docker pull $REPO:$TAG
+          docker tag $REPO:$TAG $REPO:latest
+          docker push $REPO:latest
+          release_tag=v$(jq -r '.version' < package.json)
+          echo tag=$release_tag >> $GITHUB_OUTPUT
+          echo "Releasing $REPO:$release_tag"
+          docker tag $REPO:$TAG $REPO:$release_tag
+          docker push $REPO:$release_tag
+          docker login -u $BOT_USERNAME -p '${{ secrets.BOT_TOKEN }}' ghcr.io
+          docker tag $REPO:$TAG $CACHE_REGISTRY/$CACHE_REPO:$release_tag
+          docker push $CACHE_REGISTRY/$CACHE_REPO:$release_tag
+          echo "machine github.com login ${{ env.BOT_USERNAME }} password ${{ secrets.BOT_TOKEN }}" > ~/.netrc
+          git tag -am "$COMMIT_MSG" $release_tag && git push --follow-tags
+          #Cut the CHANGELOG.md file up to the first occurence of the "### \[[0-9]*" (meaning three #, a space,a square bracket and any number after it)
+          sed -n '/### \[[0-9]*/q;p' CHANGELOG.md > NEW_CHANGELOG.md
+      - name: Create GitHub release
+        uses: ncipollo/release-action@v1.20.0
+        env:
+          token: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag: ${{ steps.git_tag.outputs.tag }}
+          name: Release ${{ steps.git_tag.outputs.tag }}
+          bodyFile: 'NEW_CHANGELOG.md'
+          generateReleaseNotes: true