build: support configurable target architecture

Makefile

@@ -1,5 +1,7 @@
 WEB_DIR := web
 SDK_DIR := sdk
+ARCH ?= $(shell go env GOARCH)
+GOOS ?= $(shell go env GOOS)
 
 .PHONY: web-install web-build sdk-install sdk-build build test vet check seed-pet-doctor docker-config docker-up docker-down docker-logs
 
@@ -16,7 +18,7 @@ sdk-build:
 	cd $(SDK_DIR) && npm run build
 
 build: web-build sdk-build
-	go build -o bin/iqudo-top1 .
+	GOOS=$(GOOS) GOARCH=$(ARCH) go build -o bin/iqudo-top1 .
 
 test:
 	go test ./...