Basic Nginx Config

nginx.conf

worker_processes  auto;

events {
    worker_connections  1024;
}

http {
    keepalive_timeout  65;

    server {
        listen       80;
        server_name  a.com;

        location / {
            root   sites/a;
            index  index.html;
        }
    }

    server {
        listen       80;
        server_name  b.com;

        location / {
            root   sites/b;
            index  index.html;
        }
    }

    server {
        listen       80;
        server_name  c.com;

        location / {
            root   sites/c;
            index  index.html;
        }
    }

}