Getting started with NodeJS, first Hello World app, prerequisites for app development and api

I am new to NodeJS and I have a droplet edshare.tech

Editing the helpText with the shark gif works but I cannot see a console output.

On Chrome I get: “DevTools failed to load SourceMap: Could not load content for chrome-extension://fehcbmngdgagfalpnfphdhojfdcoblgc/static/js/contentScript.js.map: HTTP error: status code 404, net::ERR_UNKNOWN_URL_SCHEME”

On Firefox: Error: Can’t find profile directory.

Restarting the hello app with pm2 is fine. I do it with the console of WinSCP

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I need some tutorial or example for these very first steps to running a hello world app, adding some code and test it. Could someone help me?

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Some more specific questions

• what is to be done with this 3000 port?
• I can cd in all directories. But how can I run apps in these directories?
• How can I use, for instance, index.js instead of hello.js - where is the attribution of apps to paths?
• Next step after “hello world”: the Airtable API
• Any configuration required for Nginx
• Suitable hello world examples on Github?
• Better alternative to WinSCP (working on Windows)
• Sometimes the WinSCP console says I need an interactive authorization or sudo. What is the easiest way to use the full range of commands?

Any hint would help! <3