I can not debug my web on android directly with chrome using developer tools

Laptop chrome recognizes my android but when I try to see my ubuntu localhost in the chrome on android tells me this the console:

Failed to load resource: net :: ERR_CONNECTION_REFUSED

I have to modify the apache2.conf no?

<Directory /var/www/>
         Options Indexes FollowSymLinks
        AllowOverride None
        Require all granted
        Allow from all (esto lo he añadido)
</Directory>