root@s19314357:/etc/apache2/sites-available# a2ensite cozy.conf
Enabling site cozy.
To activate the new configuration, you need to run:
  service apache2 reload
root@s19314357:/etc/apache2/sites-available# service apache2 restart
 * Restarting web server apache2                                                                       [fail]
 * The apache2 configtest failed.
Output of config test was:
AH00526: Syntax error on line 16 of /etc/apache2/sites-enabled/cozy.conf:
Invalid command 'ProxyPass', perhaps misspelled or defined by a module not included in the server configuration
Action 'configtest' failed.
The Apache error log may have more information.