To work with SFU SDK you will need a WEB Server to serve the HTML. Apache is one of many choices.
You may skip actions listed below if you are familiar with Apache installation or if you have another web server which can deliver static HTML content.
Install Apache with commands (on CentOS 7 example):
Fist line installs Apache, second line installs SSL support for Apache and third turns off SELinux. This is required to avoid possible Apache problems with content display and to quickly test application. Also, make sure standard HTTP and HTTPS ports (80 and 443) are opened and are receiving traffic if the server is behind NAT.
Start Apache with command
If Apache was installed correctly you can see your HTML files in a browser. Just put test.html file with any content to /var/www/html directory and try to open it in the browser.