Allow for configuration of GORPOXY in docker build (#655)

Co-authored-by: Bennett Sala <[email protected]>

Author: BennettJames

Dockerfile

@@ -10,6 +10,9 @@ COPY go.mod go.sum ./
 # uncomment if using vendor
 # COPY ./vendor ./vendor
 
+ARG GOPROXY
+ENV GOPROXY=${GOPROXY}
+
 RUN go mod download
 
 COPY . ./

Makefile

@@ -88,7 +88,7 @@ generate: controller-gen
 # Requires buildx to be installed: https://docs.docker.com/buildx/working-with-buildx/
 # By default the TARGETPLATFORM is set to linux/amd64, change the value if you are building for linux/arm64
 docker-build: check-env test
-	docker buildx build --platform linux/amd64 -t $(IMAGE) . --load
+	docker buildx build --platform linux/amd64 --build-arg GOPROXY=$(GOPROXY) -t $(IMAGE) . --load
 
 docker-push: check-env
 	docker push $(IMAGE)