To see the generated files on your local computer, use any browser and bring up page
/home/weewx/public_html/index.html
If you want to see it from another machine in your home network, you will have to use a webserver, such as Apache. How to do this is way beyond the purview of weewx, but briefly
sudo apt-get install apache2
Then edit the file /etc/apache2/sites-available/default to include a section:
Alias /weewx /home/weewx/public_html
<Directory "/home/weewx/public_html">
Then restart apache
sudo service apache2 restart
-tk