Use cross-compile for Docker builds

Author: hakman

Dockerfile

@@ -20,14 +20,14 @@
 # directly replaced. See here, and note that "stage" parameter mentioned there has been renamed to
 # "build-context": https://github.com/docker/buildx/pull/904#issuecomment-1005871838
 FROM golang:1.24.6-bookworm@sha256:bdc7cfd953b2701fcd95fd591ea3d788f41e4b74f21f1787b9f9843a28e72196 AS builder-base
-FROM builder-base AS builder
+FROM --platform=$BUILDPLATFORM builder-base AS builder
 
 ARG TARGETARCH
 
 ENV GOPATH=/gopath/
 ENV PATH=$GOPATH/bin:$PATH
 
-RUN apt-get update --fix-missing && apt-get --yes install libsystemd-dev gcc-aarch64-linux-gnu
+RUN apt-get update --fix-missing && apt-get --yes install libsystemd-dev
 RUN go version
 
 COPY . /gopath/src/k8s.io/node-problem-detector/