Use node prefix for build-in modules (#3340)

It is basically a cosmetic thing, but has the following advantages:

1. Consistency with the official node documentation. The prefix is used
there.
2. It is easier to recognize the build-in modules.

js/app.js

@@ -8,8 +8,8 @@
 // Alias modules mentioned in package.js under _moduleAliases.
 require("module-alias/register");
 
-const fs = require("fs");
-const path = require("path");
+const fs = require("node:fs");
+const path = require("node:path");
 const envsub = require("envsub");
 const Log = require("logger");
 

js/check_config.js

@@ -5,8 +5,8 @@
  * By Rodrigo Ramírez Norambuena https://rodrigoramirez.com
  * MIT Licensed.
  */
-const path = require("path");
-const fs = require("fs");
+const path = require("node:path");
+const fs = require("node:fs");
 const { Linter } = require("eslint");
 
 const linter = new Linter();

js/server.js

@@ -4,10 +4,10 @@
  * By Michael Teeuw https://michaelteeuw.nl
  * MIT Licensed.
  */
-const fs = require("fs");
-const http = require("http");
-const https = require("https");
-const path = require("path");
+const fs = require("node:fs");
+const http = require("node:http");
+const https = require("node:https");
+const path = require("node:path");
 const express = require("express");
 const ipfilter = require("express-ipfilter").IpFilter;
 const helmet = require("helmet");

js/server_functions.js

@@ -1,5 +1,5 @@
-const fs = require("fs");
-const path = require("path");
+const fs = require("node:fs");
+const path = require("node:path");
 const Log = require("logger");
 
 const startUp = new Date();

js/utils.js

@@ -4,7 +4,7 @@
  * By Rodrigo Ramírez Norambuena https://rodrigoramirez.com
  * MIT Licensed.
  */
-const execSync = require("child_process").execSync;
+const execSync = require("node:child_process").execSync;
 const colors = require("colors/safe");
 const Log = require("logger");
 const si = require("systeminformation");