Update Dockerfile

Dockerfile

@@ -2,7 +2,7 @@ FROM ubuntu:latest
 
 RUN apt update && apt install sudo -y
 
-RUN curl -s https://ngrok-agent.s3.amazonaws.com/ngrok.asc | sudo tee /etc/apt/trusted.gpg.d/ngrok.asc >/dev/null && echo "deb https://ngrok-agent.s3.amazonaws.com buster main" | sudo tee /etc/apt/sources.list.d/ngrok.list && sudo apt update && sudo apt install ngrok
+RUN sudo tar xvzf ~/Downloads/ngrok-v3-stable-linux-amd64.tgz -C /usr/local/bin
 
 RUN ngrok config add-authtoken 1y5X8j8Kqn3fVWK7uqbhvQEdn2h_24zVTS7bJjd1LQE4kZiL9