doc/install: mention GOPATH and point to code.html
Fixes #3469.
R=golang-dev, kevlar, rsc, r
CC=golang-dev
https://golang.org/cl/6304049
diff --git a/doc/install-source.html b/doc/install-source.html
index 87c187b..721d28b 100644
--- a/doc/install-source.html
+++ b/doc/install-source.html
@@ -218,6 +218,12 @@
If you see the "hello, world" message then Go is installed correctly.
</p>
+<h2 id="gopath">Set up your work environment</h2>
+
+<p>
+The document <a href="/doc/code.html">How to Write Go Code</a> explains how to
+set up a work environment in which to build and test Go code.
+</p>
<h2 id="community">Community resources</h2>
