Answers for "install ngrok"

brew install ngrok

brew cask install ngrok

install ngrok

npm i -g ngrok

install nginx

sudo apt-get update
sudo apt-get -y install nginx

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

install ngrok on server

ngrok http -host-header="localhost:[port]" [port]