Revise require imports (#3071)

- order (external first)
- remove superfluous file extensions
- new line after imports
- deconstruct (only one time (in `check_config.js`))
- fix path (only one time (in `global-setup.js`))

tests/unit/classes/translator_spec.js

@@ -2,6 +2,7 @@ const path = require("path");
 const helmet = require("helmet");
 const { JSDOM } = require("jsdom");
 const express = require("express");
+
 const sockets = new Set();
 
 describe("Translator", () => {