How to prevent my site from website copier softwares
You can't. You would have to either have to lock down your website for everyone or leave it open to everyone. And a website that is publically accessible will be readable and will thus be copyable.
You can try to prevent some stuff by disabling right mouse clicks, for example, but you really cannot prevent all copying, as long as the HTML source code can be read (and it can, if your website is publically accessible).