Update setup.md
Update  golang version
@@ -69,7 +69,7 @@ apt-get update -qq && apt-get install -y \
If using an older release or a long-term support release, be careful to double-check that the version of `runc` is new enough (running `runc --version` should produce `spec: 1.0.0`), or else build your own.
-Be careful to double-check that the version of golang is new enough, version 1.8.x or higher is required. If needed, golang kits are available at https://golang.org/dl/
+Be careful to double-check that the version of golang is new enough, version 1.12.x or higher is required. If needed, golang kits are available at https://golang.org/dl/
## Get Source Code
