best way to nstall ngrok code example

Example 1: ngrok

Start tunnel with any port
./ngrok http http://localhost:9999

Example:
http://1ffcb38dcb8b.ngrok.io/paragonasia/

BAD:
http://1ffcb38dcb8b.ngrok.io/paragonasia

Start tunnel with prt 80
./ngrok http 80

Example 2: how to add iis to ngrok

ngrok http -host-header="localhost:58821" 58821