Added GH action job to publish installer image on release published

Author: vicenteherrera

.github/workflows/build.yaml

@@ -178,3 +178,48 @@ jobs:
           image-tag: "sysdiglabs/aks-audit-log-installer"
           sysdig-secure-token: ${{ secrets.KUBELAB_SECURE_API_TOKEN }}
 
+  publish_images:
+      name: Publish container images to registries
+      needs: [check_bash_installer, check_yaml, check_dotnet, sysdig_image_scan, sysdig_image_scan_forwared, sysdig_image_scan_installer]
+      if: github.event_name == 'release'
+      steps:
+        - name: Checkout
+          uses: actions/checkout@v2
+        - name: Set up QEMU
+          uses: docker/setup-qemu-action@v1
+        - name: Set up Docker Buildx
+          uses: docker/setup-buildx-action@v1
+        - name: Login to DockerHub
+          uses: docker/login-action@v1 
+          with:
+            username: ${{ secrets.SYSDIGLABS_DOCKERHUB_USER }}
+            password: ${{ secrets.SYSDIGLABS_DOCKERHUB_TOKEN }}
+        # - name: Login to GitHub Container Registry
+        #   uses: docker/login-action@v1 
+        #   with:
+        #     registry: ghcr.io
+        #     username: ${{ github.repository_owner }}
+        #     password: ${{ secrets.CR_PAT }}
+        - name: Prepare version major
+          id: prepare_version_major
+          env:
+            VERSION_FULL: ${{ github.event.release.tag_name }}
+          run: |
+            echo "Version full: $VERSION_FULL"
+            VERSION_MAJOR=$(echo $VERSION_FULL | sed 's/[^0-9]*\([0-9]\+\).*/\1/')
+            echo "Version major: $VERSION_MAJOR"
+            echo "::set-output name=VERSION_MAJOR::$VERSION_MAJOR"
+            
+        - name: Build and push - Installer
+          uses: docker/build-push-action@v2
+          with:
+            context: .
+            file: ./build/Dockerfile
+            platforms: linux/amd64
+            push: true
+            tags: |
+              sysdiglabs/aks-audit-log-installer:latest
+              sysdiglabs/aks-audit-log-installer:${{ github.event.release.tag_name }}
+              sysdiglabs/aks-audit-log-installer:${{ steps.prepare_version_major.outputs.VERSION_MAJOR }}
+        # ghcr.io/user/app:latest
+        # ghcr.io/user/app:1.0.0