Include instructions on how to build the docs

WhyNotHugo · WhyNotHugo · commit 35e4343a38b8 · 2023-09-20T16:41:14.000+02:00
diff --git a/README.rst b/README.rst
@@ -37,6 +37,8 @@ Documentation
 
 Full documentation is published at http://python-barcode.rtfd.io/
 
+You can build the documentation locally using ``make -C docs html``.
+
 Licence
 -------
 
