added CDN settings to reaction

imports/plugins/core/core/server/startup/cdn.js

@@ -0,0 +1,14 @@
+import { Meteor } from "meteor/meteor";
+
+/**
+ * @name setupCdn
+ * @summary sets prefix for the user who wants to serve bundled js and css
+ * files from different URL
+ *
+ * @return {undefined} undefined
+ */
+export default function setupCdn() {
+  if (Meteor.settings.cdnPrefix) {
+    Meteor.startup(() => WebAppInternals.setBundledJsCssPrefix(Meteor.settings.cdnPrefix)); // eslint-disable-line no-undef
+  }
+}

imports/plugins/core/core/server/startup/index.js

@@ -10,6 +10,7 @@ import Prerender from "./prerender";
 import RateLimiters from "./rate-limits";
 import RegisterCore from "./register-core";
 import RegisterRouter from "./register-router";
+import setupCdn from "./cdn";
 import Reaction from "../Reaction";
 import { Shops } from "/lib/collections";
 
@@ -26,6 +27,7 @@ SimpleSchema.defineValidationErrorTransform((error) => {
 export default function startup() {
   const startTime = Date.now();
 
+  setupCdn();
   Accounts();
   RegisterCore();
   RegisterRouter();