Update selfhosted awesomelist

Added ERP systems category, and added Odoo to this list.

README.md

@@ -342,6 +342,8 @@ _Recipe management_
 
   * [OpenEats](http://www.openeats.org/) - A recipe management site that allows users to create, store, share and rate recipes, create grocery lists, and more. ([Source Code](https://github.com/qgriffith/OpenEats) `Python/Django` `BSD`
 
+### Enterprise Resource Planning
+* [Odoo](http://odoo.com) - Free open source ERP system. ([Source Code](https://github.com/odoo/odoo)) ([Docker Container](https://github.com/docker-library/docs/tree/master/odoo)) `GPLv3` `PYTHON`
 
 ### E-commerce