So far, I read on MacRumors of:
System-wide site
Files at
/Library/WebServer/Documentswill, by default, be shared as the root Web site when Web sharing is turned on. These files can be accessed athttp://localhost/orhttp://<yourIPaddress>.User-specific sites
Files at
~/Sites, or in your home folder's Sites folder, are considered your user-specific site files. Each user by default has one of these folders. Each user's site can be accessed athttp://<yourIPaddress>/~(shortusername).
It's all depicted when activating Web Sharing:

But my static files are in a different folder, so I would like to serve them from ~/Projects/js-spa instead of from ~/Sites, but reading about configuring Apache, I can't find /etc/httpd/httpd.conf on Lion.
How can I configure where do I want to serve the personal website from?