multi needs QEMU for some pieces

.github/workflows/on-tag.yaml

@@ -58,6 +58,8 @@ jobs:
           file: cmd/kured/Dockerfile.multi
           platforms: linux/arm64, linux/amd64, linux/arm/v7, linux/arm/v6, linux/386
           push: true
+#          cache-from: type=registry,ref=user/app:buildcache
+#          cache-to: type=inline
           tags: |
             docker.io/${{ GITHUB.REPOSITORY }}:${{ steps.tags.outputs.version }}
             ghcr.io/${{ GITHUB.REPOSITORY }}:${{ steps.tags.outputs.version }}

cmd/kured/Dockerfile.multi

@@ -9,6 +9,8 @@ ENV GOARCH=$TARGETARCH
 ENV GOVARIANT=$TARGETVARIANT
 
 WORKDIR /src
+COPY go.mod go.sum .
+RUN go mod download
 COPY . .
 RUN go list -f '{{join .Deps "\n"}}' ./cmd/kured | grep -v /vendor/ | xargs go list -f '{{if not .Standard}}{{ $dep := . }}{{range .GoFiles}}{{$dep.Dir}}/{{.}} {{end}}{{end}}'
 RUN CGO_ENABLED=0 go build -o cmd/kured/kured cmd/kured/*.go