Add arm64 Docker image

Signed-off-by: Kian Sutarwala <kalissaac@protonmail.com>

.github/workflows/publish.yaml

@@ -32,10 +32,14 @@ jobs:
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
 
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@dc7b9719a96d48369863986a06765841d7ea23f6
+
       - name: Build and push Docker image
         uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
         with:
           context: .
+          platforms: linux/amd64,linux/arm64
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}

Dockerfile

@@ -1,4 +1,4 @@
-FROM node:16-buster as builder
+FROM --platform=$BUILDPLATFORM node:16-buster as builder
 
 WORKDIR /src