update README

README.md

@@ -39,6 +39,35 @@ to
 
 `local   all     all     md5`
 
+## Apache and NodeJS to serve through port :80
+
+Edit your site on `etc/apache2/sites-enabled`.
+
+Either at the end of your site config or at the end the VirtualHost directive of add the following:
+```
+<VirtualHost *:80>
+    ...
+    ProxyRequests on
+    ProxyPass /[path]/ http://localhost:[port]/[path]/
+</VirtualHost>
+```
+
+Enable the following apache modules:
+```
+sudo a2enmod proxy
+sudo a2enmod proxy_http
+sudo a2enmod proxy_balancer
+sudo a2enmod lbmethod_byrequests
+```
+And restart Apache:
+```
+sudo service apache2 restart
+```
+Now you can serve your app through port 80 instead of 8090 or something else.
+
+NodeJS requests will be routed to port 8090 :)
+
+
 ## Installation
 If you don't have git, you can donwload [a zip file](https://github.com/anneb/pgserver/archive/master.zip) of the project instead.