doc: document make docopen

Documented `make docopen` as a way to read documentation in the browser. PR-URL: #19321 Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Vse Mozhet Byt <[email protected]> Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Yuta Hiroto <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Trivikram Kamat <[email protected]>
nodejs · Mar 27, 2018 · 5e9f929 · 5e9f929
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diff --git a/BUILDING.md b/BUILDING.md
@@ -206,6 +206,15 @@ To read the documentation:
 $ man doc/node.1
 ```
 
+If you prefer to read the documentation in a browser,
+run the following after `make doc` is finished:
+
+```console
+$ make docopen
+```
+
+This will open a browser with the documentation.
+
 To test if Node.js was built correctly:
 
 ```console