My droplet IP Address is 188.8.131.52 and the PM2 status is showing online.
I am not able to connect it, its showing "The site can't be reached".
I have added the name servers
How are you trying to reach the application via your browser? Do you use the port like so <^>http://domain.com:3000<^> or are you using only <^>http://domain.com<^>. If you are using the latter, ...