general: try to fix multiarch build

frontend/Dockerfile

@@ -1,19 +0,0 @@
-FROM golang:buster AS step_0
-#
-# IMAGE_ARCH is the binary format of the final output
-# BUILD_ARCH is the binaary format of the build host
-#
-ARG IMAGE_ARCH=amd64
-ARG BUILD_ARCH=amd64
-#
-ENV CGO_ENABLED=0 GOOS=linux GOARCH=$IMAGE_ARCH GO111MODULE=on
-WORKDIR /root
-COPY . .
-# go-bindata is run on the build host as part of the go generate step
-RUN GOARCH=$BUILD_ARCH go get -u github.com/kevinburke/go-bindata/...
-RUN go generate
-RUN go build -ldflags "-w -s" -o /frontend
-
-FROM scratch AS step_1
-COPY --from=step_0 /frontend /
-ENTRYPOINT ["/frontend"]