Update go to 1.13.9
@@ -40,7 +40,7 @@ ARCH ?= amd64
ALL_ARCH := amd64
# Image to use for building.
-BUILD_IMAGE ?= golang:1.12.3-alpine
+BUILD_IMAGE ?= golang:1.13.9-alpine
# Containers will be named: $(CONTAINER_PREFIX)-$(BINARY)-$(ARCH):$(VERSION).
CONTAINER_PREFIX ?= ingress-gce
