feat: allow changing requirejs base url

public/src/require-config.js

@@ -1,7 +1,7 @@
 'use strict';
 
 require.config({
-	baseUrl: config.relative_path + '/assets/src/modules',
+	baseUrl: config.requireBaseUrl,
 	waitSeconds: 0,
 	urlArgs: config['cache-buster'],
 	paths: {

src/controllers/api.js

@@ -19,6 +19,7 @@ apiController.loadConfig = async function (req) {
 	let config = {
 		relative_path: nconf.get('relative_path'),
 		upload_url: nconf.get('upload_url'),
+		requireBaseUrl: nconf.get('relative_path') + '/assets/src/modules',
 		siteTitle: validator.escape(String(meta.config.title || meta.config.browserTitle || 'NodeBB')),
 		browserTitle: validator.escape(String(meta.config.browserTitle || meta.config.title || 'NodeBB')),
 		titleLayout: (meta.config.titleLayout || '{pageTitle} | {browserTitle}').replace(/{/g, '{').replace(/}/g, '}'),