From 263504574fc8ba609ced30f9a0413a91b821c532 Mon Sep 17 00:00:00 2001
From: Ingo Oppermann <ingo@datarhei.com>
Date: Tue, 2 Apr 2024 14:32:47 +0200
Subject: [PATCH] Use cross-compilation instead of emulation

---
 Dockerfile | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index da7039c7..342644b1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,8 +1,12 @@
 ARG GOLANG_IMAGE=golang:1.20-alpine3.16
-
 ARG BUILD_IMAGE=alpine:3.16
 
-FROM $GOLANG_IMAGE as builder
+# Cross-Compilation
+# https://www.docker.com/blog/faster-multi-platform-builds-dockerfile-cross-compilation-guide/
+FROM --platform=$BUILDPLATFORM $GOLANG_IMAGE as builder
+
+ARG TARGETOS TARGETARCH
+ENV GOOS=$TARGETOS GOARCH=$TARGETARCH
 
 COPY . /dist/core