Dockerfile: add darwin/arm64 and windows/arm64 support

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

.github/workflows/build.yml

@@ -252,7 +252,7 @@ jobs:
         run: |
           ./hack/cross
         env:
-          PLATFORMS: ${{ env.PLATFORMS }},darwin/amd64,windows/amd64
+          PLATFORMS: ${{ env.PLATFORMS }},darwin/amd64,darwin/arm64,windows/amd64,windows/arm64
           RUNC_PLATFORMS: ${{ env.PLATFORMS }}
           CACHEDIR_FROM: /tmp/.buildkit-cache/${{ env.CACHEKEY_CROSS }}
           CACHEDIR_TO: /tmp/.buildkit-cache/${{ env.CACHEKEY_CROSS }}-new
@@ -382,7 +382,7 @@ jobs:
         run: |
           ./hack/release-tar "${{ needs.release-base.outputs.tag }}" release-out
         env:
-          PLATFORMS: ${{ env.PLATFORMS }},darwin/amd64,windows/amd64
+          PLATFORMS: ${{ env.PLATFORMS }},darwin/amd64,darwin/arm64,windows/amd64,windows/arm64
           CACHEDIR_FROM: /tmp/.buildkit-cache/${{ env.CACHEKEY_BINARIES }} /tmp/.buildkit-cache/${{ env.CACHEKEY_CROSS }}
       -
         name: Move artifacts

Dockerfile

@@ -22,8 +22,19 @@ RUN apk add --no-cache git
 # xx is a helper for cross-compilation
 FROM --platform=$BUILDPLATFORM tonistiigi/xx:golang@sha256:810dc54d5144f133a218e88e319184bf8b9ce01d37d46ddb37573e90decd9eef AS xx
 
+FROM --platform=$BUILDPLATFORM golang:1.13-alpine AS gostable
+FROM --platform=$BUILDPLATFORM golang:1.16-alpine AS golatest
+
+FROM gostable 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=$BUILDPLATFORM tonistiigi/golang:497feff1-alpine AS go-windows-arm64
+FROM go-windows-${TARGETARCH} AS go-windows
+
 # gobuild is base stage for compiling go/cgo
-FROM --platform=$BUILDPLATFORM golang:1.13-alpine AS gobuild-base
+FROM go-${TARGETOS} AS gobuild-base
 RUN apk add --no-cache file bash clang lld pkgconfig git make
 COPY --from=xx / /