Add multiarch image build workflow

.github/workflows/dockerhub-build-push-multi-arch.yml

@@ -0,0 +1,69 @@
+# Source: https://github.com/panubo/reference-github-actions/blob/main/dockerhub-build-push-multi-arch.yml
+# Description: Multi arch build and push to Docker Hub
+# LICENSE: MIT License, Copyright (c) 2022 Volt Grid Pty Ltd t/a Panubo
+
+# - Multi arch build, amd64 and arm64
+# - Uses docker/metadata-action to generate image tags
+# - Push to dockerhub
+
+name: Docker Hub Build and Push (Multi-arch)
+
+env:
+  REPO_NAME: docker.io/panubo/sshd
+
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - 'v*'
+
+jobs:
+  build_and_push:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          # list of Docker images to use as base name for tags
+          images: |
+            ${{ env.REPO_NAME }}
+          # generate Docker tags based on the following events/attributes
+          tags: |
+            type=schedule
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=sha
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to Docker Hub
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.PANUBUILD_DOCKERHUB_USERNAME }}
+          password: ${{ secrets.PANUBUILD_DOCKERHUB_TOKEN }}
+
+      - name: Build and Push
+        uses: docker/build-push-action@v3
+        with:
+          builder: ${{ steps.buildx.outputs.name }}
+          context: .
+          file: Dockerfile
+          push: ${{ github.event_name != 'pull_request' }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          platforms: linux/amd64,linux/arm64
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}