https://www.odoo.com/documentation/9.0/howtos/website.html
After I test this I get this error:
File "/usr/lib/python2.7/dist-packages/openerp/addons/base/ir/ir_model.py", line 993, in xmlid_lookup raise ValueError('External ID not found in the system: %s' % (xmlid))QWebTemplateNotFound: External ID not found in the system: academy.index
If you are new to odoo development, see this: https://www.youtube.com/watch?v=BDepk0LhVuI&list=PLqRRLx0cl0hoJhjFWkFYowveq2Zn55dhM