Install ngrok and Add ngrok authtoken

1. Install ngrok: 

https://snapcraft.io/install/ngrok/ubuntu

 2. Sign up account to ngrok: here is getting ngrok authtoken

https://dashboard.ngrok.com/get-started/your-authtoken

https://dashboard.ngrok.com/get-started/setup/linux

3. Add token run command of terminal: ngrok authtoken xxxxxxxxxxxxxxxxxxxxxxxxx
OR

ngrok config add-authtoken xxxxxxxxxxxxxxxxxxxxxxxxxxxxx

4. Then run resrver : ngrok http 3001

5. Then add in development env: config.hosts << "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"

6. Then server restart: rails s

https://stackoverflow.com/questions/72244171/cant-add-authtoken-to-ngrok