Build docker images for amd64 and arm64

Author: mccutchen

.github/workflows/continuous_delivery.yaml

@@ -18,13 +18,16 @@ jobs:
     name: Test
     runs-on: ubuntu-latest
     steps:
-    - name: Setup
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    - name: Setup go
       uses: actions/setup-go@v2
       with:
         go-version: '1.16'
 
-    - name: Checkout
-      uses: actions/checkout@v2
+    - name: Set up docker buildx
+      uses: docker/setup-buildx-action@v1
 
     - name: Build
       run: make build

Makefile

@@ -142,10 +142,10 @@ gcloud-auth:
 # docker images
 # =============================================================================
 image:
-	DOCKER_BUILDKIT=1 docker build -t $(DOCKER_TAG_DOCKERHUB) .
+	docker buildx build --platform linux/amd64,linux/arm64 -t $(DOCKER_TAG_DOCKERHUB) .
 
-imagepush: image
-	docker push $(DOCKER_TAG_DOCKERHUB)
+imagepush:
+	docker buildx build --push --platform linux/amd64,linux/arm64 -t $(DOCKER_TAG_DOCKERHUB) .
 
 
 # =============================================================================