docs: add links to workspace-config page

Author: jbogarthyde

packages/angular/cli/commands/build-long.md

@@ -11,4 +11,4 @@ either by direct editing or with the `ng config` command.
 These include `assets`, `styles`, and `scripts` objects that provide runtime-global resources to include in the project. 
 Resources in CSS, such as images and fonts, are automatically written and fingerprinted at the root of the output folder.
 
-For further details, see Workspace Configuration.
+For further details, see [Workspace Configuration](guide/workspace-config).

packages/angular/cli/commands/config-long.md

@@ -0,0 +1,11 @@
+A workspace has a single CLI configuration file, `angular.json`, at the top level. 
+The `projects` object contains a configuration object for each project in the workspace.
+
+You can edit the configuration directly in a code editor, 
+or indirectly on the command line using this command. 
+
+The configurable property names match command option names, 
+except that in the configuration file, all names must use camelCase, 
+while on the command line options can be given in either camelCase or dash-case.
+
+For further details, see [Workspace Configuration](guide/workspace-config).