Further optimizations of multi build

.github/workflows/on-tag.yaml

@@ -44,8 +44,8 @@ jobs:
           username: weave-ghcr-bot
           password: ${{ secrets.KURED_WEAVE_GHCR_BOT_TOKEN }}
 
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v1
+#      - name: Set up QEMU
+#        uses: docker/setup-qemu-action@v1
 
       - name: Set up Docker Buildx
         id: buildx

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