Update description about bare metal server.
Update description about bare metal server.

davydovanton/ruby-bench-web,ruby-bench/ruby-bench-web,ruby-bench/ruby-bench-web,klgilbert/ruby-bench-web,davydovanton/ruby-bench-web,davydovanton/ruby-bench-web,treble37/ruby-bench-web,bmarkons/ruby-bench-web,hanmd82/ruby-bench-web,klgilbert/ruby-bench-web,bmarkons/ruby-bench-web,tgxworld/ruby-bench-web,klgilbert/ruby-bench-web,bmarkons/ruby-bench-web,hanmd82/ruby-bench-web,treble37/ruby-bench-web,tgxworld/ruby-bench-web,treble37/ruby-bench-web,hanmd82/ruby-bench-web,tgxworld/ruby-bench-web,ruby-bench/ruby-bench-web