new workflow

Author: lamprosfasoulas

.github/workflows/push-k8s-image.yml

@@ -0,0 +1,58 @@
+name: Build and Push k8s Image
+
+on:
+  workflow_dispatch:
+    inputs:
+      runtime:
+        description: 'Runtime image'
+        required: true
+        default: 'hackmdio/runtime:16.20.2-35fe7e39'
+      buildpack:
+        description: 'Buildpack image'
+        required: true
+        default: 'hackmdio/buildpack:16.20.2-35fe7e39'
+  push:
+    tags:
+      - '*'
+    branches:
+      - k8s
+
+env:
+  REGISTRY_IMAGE: demo-images/codimd
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout source
+        uses: actions/checkout@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to Docker registry
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.NEXUS_USERNAME }}
+          password: ${{ secrets.NEXUS_PASSWORD }}
+          registry: ${{ secrets.NEXUS_REGISTRY }}
+
+      - name: Determine tag
+        id: tag
+        run: |
+          if [[ "${GITHUB_REF}" == refs/tags/* ]]; then
+            echo "IMAGETAG=k8s-${GITHUB_REF#refs/tags/}" >> $GITHUB_OUTPUT
+          else
+            echo "IMAGETAG=k8s-latest" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: deployments/Dockerfile
+          push: true
+          tags: ${{ secrets.NEXUS_REGISTRY }}/${{ env.REGISTRY_IMAGE }}:${{ steps.tag.outputs.IMAGETAG }}
+          build-args: |
+            RUNTIME=${{ github.event.inputs.runtime || 'hackmdio/runtime:16.20.2-35fe7e39' }}
+            BUILDPACK=${{ github.event.inputs.buildpack || 'hackmdio/buildpack:16.20.2-35fe7e39' }}