Publish arm64 Docker images (#190)

* Enable multi-platform builds

* Bump docker/login-action

* Enable push

* Add multi-arch build to PR action

---------

Co-authored-by: Michael de Hoog <michael.dehoog@coinbase.com>

Author: mikery

.github/workflows/docker.yml

@@ -19,7 +19,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Log into the Container registry
-        uses: docker/login-action@v2
+        uses: docker/login-action@v3
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
@@ -31,10 +31,14 @@ jobs:
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
 
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
       - name: Build and push the Docker image
         uses: docker/build-push-action@v4
         with:
           context: .
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+          platforms: linux/amd64,linux/arm64

.github/workflows/pr.yml

@@ -6,13 +6,19 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        arch: [ linux/amd64, linux/arm64 ]
     steps:
       - name: Checkout
         uses: actions/checkout@v3
         with:
           ref: ${{ github.event.pull_request.head.sha }}
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
       - name: Build the Docker image
         uses: docker/build-push-action@v4
         with:
           context: .
           push: false
+          platforms: ${{ matrix.arch }}