Debug/release mode for HTML5 export?

[Godot 3.5.2-stable]

How do you specify that an HTML5 export is release or debug?

I found the answer. (I posted this same question on the Godot Discord this morning, and received the solution ten hours later.)

I tested this with HTML5 and Android exports, and it worked properly.

Thanks for providing the answer/solution to your own question.