[ADD] multi_website: add info to configure multiple domains

closes #1898

X-original-commit: 324936c
Signed-off-by: Antoine Vandevenne (anv) <[email protected]>

Author: Yenthe666

Diff for: content/applications/websites/website/publish/multi_website.rst

@@ -126,6 +126,15 @@ be redirected to the right website using GeoIP.
 .. seealso::
    - :doc:`/administration/maintain/domain_names`
 
+If you setup an extra website and specify the domain name you will have to
+do three things to get this feature to work:
+
+#. Setup an A-record in the DNS configuration of your hosting provider so
+   that "www.mywebsite2.ext" is redirected to the IP of your Odoo instance.
+#. Create an extra Nginx ``server`` block in which you set the
+   ``server_name`` that you've set in the :guilabel:`Website domain` field.
+#. Reload and restart your Nginx instance to use the new ``server`` block.
+
 Customize the visitor experience
 ================================