Update docusaurus, v4 preps, security fixes (#282)

* Update docusaurus, v4 preps, security fixes

* Require node 20

Author: Devon-White

Dockerfile

@@ -1,4 +1,4 @@
-FROM node:18 AS builder
+FROM node:20 AS builder
 WORKDIR /app
 
 # Install dependencies

babel.config.js

@@ -9,16 +9,25 @@ const darkCodeTheme = Themes.dracula;
 /** @type {import('@docusaurus/types').Config} */
 const config = {
 
+  future: {
+    v4: true,
+    experimental_faster: true
+  },
+
   themes: [
     "docusaurus-theme-search-typesense",
   ],
   title: "FreeSWITCH Documentation",
   url: "https://developer.signalwire.com",
   baseUrl: "/freeswitch/",
   onBrokenLinks: "throw",
-  onBrokenMarkdownLinks: "throw",
   onBrokenAnchors: "throw",
   favicon: "img/favicon.webp",
+  markdown: {
+    hooks: {
+      onBrokenMarkdownLinks: "throw"
+    }
+  },
 
   // Even if you don't use internalization, you can use this field to set useful
   // metadata like html lang. For example, if your site is Chinese, you may want