• install termux android app from google appstore
• start termux app on your android and wait for the installation to finish
• update , install curl with:

apt update && apt install -y curl

• download the script and execute it with the command below and wait for a while:

sh -c "$(curl -fsSL https://raw.githubusercontent.com/brunobell/termux_webserver_with_ngrok/master/install.sh)"

• when you are done with the contemporary mobile server, remember to shut apache/nginx server down with pkill