upgrade to go 1.13

Makefile

@@ -1,13 +1,26 @@
 .PHONY: all deps build test check
 
 GO ?= go
+# "As of Go 1.13, the go command by default downloads and authenticates modules using the
+# Go module mirror and Go checksum database run by Google"
+# see go help module-private for detail
+GOPRIVATE ?=
 GOLINT ?= golint
+ENV ?= local
+
+GITURL ?= [email protected]
 
 deps:
-	$(GO) mod tidy
+	GOPRIVATE=${GOPRIVATE} $(GO) mod download
+
+# Use a github token or similar to access private repos
+# In this example it's got no efffexct rather than changing from ssh to https
+gitconfig:
+	git config --global url.${GITURL}.insteadOf https://github.com
+
 
-build:
-	$(GO) build  -ldflags="-X 'github.com/AndersonQ/go-skeleton/handlers.version=$$(git rev-parse HEAD)' -X 'github.com/AndersonQ/go-skeleton/handlers.buildTime=$$(date -R)'"
+build: deps
+	ENV=${ENV} CGO_ENABLED=0 $(GO) build -ldflags="-X 'github.com/AndersonQ/go-skeleton/handlers.version=$$(git rev-parse HEAD)' -X 'github.com/AndersonQ/go-skeleton/handlers.buildTime=$$(date -R)'"
 
 test: deps
 	$(GO) test -cover ./...

go.mod

@@ -7,3 +7,5 @@ require (
 	github.com/rs/zerolog v1.14.3
 	github.com/stretchr/testify v1.3.0 // indirect
 )
+
+go 1.13