Dockerfile: enable windows/arm64

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

.github/workflows/build.yml

@@ -118,7 +118,7 @@ jobs:
         run: |
           make cross
         env:
-          TARGETPLATFORM: ${{ env.PLATFORMS }},darwin/amd64,darwin/arm64,windows/amd64
+          TARGETPLATFORM: ${{ env.PLATFORMS }},darwin/amd64,darwin/arm64,windows/amd64,windows/arm64
           CACHEDIR_FROM: /tmp/.buildx-cache/${{ env.CACHEKEY_BINARIES }}
 
   binaries:
@@ -160,7 +160,7 @@ jobs:
         run: |
           ./hack/release "${{ steps.prep.outputs.tag }}" release-out
         env:
-          PLATFORMS: ${{ env.PLATFORMS }},darwin/amd64,darwin/arm64,windows/amd64
+          PLATFORMS: ${{ env.PLATFORMS }},darwin/amd64,darwin/arm64,windows/amd64,windows/arm64
           CACHEDIR_FROM: /tmp/.buildx-cache/${{ env.CACHEKEY_BINARIES }}
       -
         name: Move artifacts

Dockerfile

@@ -8,7 +8,17 @@ FROM docker:$DOCKERD_VERSION AS dockerd-release
 # xx is a helper for cross-compilation
 FROM --platform=$BUILDPLATFORM tonistiigi/xx@sha256:21a61be4744f6531cb5f33b0e6f40ede41fa3a1b8c82d5946178f80cc84bfc04 AS xx
 
-FROM --platform=$BUILDPLATFORM golang:1.16-alpine AS gobase
+FROM --platform=$BUILDPLATFORM golang:1.16-alpine AS golatest
+
+FROM golatest AS go-linux
+FROM golatest AS go-darwin
+FROM golatest AS go-windows-amd64
+FROM golatest AS go-windows-386
+FROM golatest AS go-windows-arm
+FROM --platform=$BUILDPLATFORM golang:1.17beta1-alpine AS go-windows-arm64
+FROM go-windows-${TARGETARCH} AS go-windows
+
+FROM go-${TARGETOS} AS gobase
 COPY --from=xx / /
 RUN apk add --no-cache file git
 ENV GOFLAGS=-mod=vendor