readme: added Docker build info

README.md

@@ -21,6 +21,15 @@ For a static site build:
     $ yarn build
 
 
+## Building for deploy
+
+Check if Docker flow works (build & launch):
+
+    $ yarn build
+    $ docker build -t kerberos/documentation .
+    $ docker run --name kerberos-docs -p 80:80 -d kerberos/documentation
+
+
 ## Notes
 
 **Theme colors** are defined in `/doczrc.js` > `themeConfig > colors`, which can then be used in `styles.js` of underlying components.