Here are some answers I hope will be helpful to others:

JavaScript

If primitives are immutable and have no methods, why can a method be called on a string?

Security

How to secure a comment form in a non-CMS environment with no user authentication?

Node

How to use Helmet to define Content Security Policy?

How do routes, middleware and next work in Express?

How to split a string into chunks of a particular byte size?

OpenShift

How to view OpenShift Online node application logs locally?

How to connect to OpenShift 3 MongoDB remotely?

Miscellaneous

(Git Bash) How to create a multi-terminal Git Bash environment with Windows Terminal?

(Codepen) How to add a syntax highlighting theme to codepen?

And here are some links to recommended learning content:

JavaScript: Understanding the Weird Parts - The First 3.5 Hours (YouTube video link)

This is a great, and deep, introduction to JavaScript that will answer a lot of questions new JS developers will have about common terminology and dynamics. I wish I had viewed it when I first started.