Update getting-started.md
This would have been very helpful to me when first approaching Bazel.
Closes
@@ -34,6 +34,9 @@ tutorial:
* [Tutorial: Build an iOS Application](tutorial/ios-app.html)
+If you find yourself unsure of how Workspace, Packages, Targets and Rules
+relate to each other, jump to the [Bazel Concepts](build-ref.html) page.
+
Once you are familiar with the basics, you can try the rules for
[other languages](be/overview.html).
