no indexation of the robots

Hello,
first, sorry for my bad english...

We are a little cooperative. We have a website (with wordpress), on a mutualised server.
We want to install Projqtor on the server of our website. But we don't want to that the robots of the web index the repertory of projeqtor.
How could it work ? Do we have to add a line on the htaccess (of our website or of Projeqtor?) ?
If yes, wich line ?

Thank you for your answers,
and have a nice day