add better description for resetServiceWorkersPublicPath

app/assets/javascripts/ide/index.js

@@ -28,8 +28,11 @@ export function initIde(el) {
   });
 }
 
+// tell webpack to load assets from origin so that web workers don't break
 export function resetServiceWorkersPublicPath() {
-  // tell webpack to load assets from origin so that web workers don't break
+  // __webpack_public_path__ is a global variable that can be used to adjust
+  // the webpack publicPath setting at runtime.
+  // see: https://webpack.js.org/guides/public-path/
   const relativeRootPath = (gon && gon.relative_url_root) || '';
   const webpackAssetPath = `${relativeRootPath}/assets/webpack/`;
   __webpack_public_path__ = webpackAssetPath; // eslint-disable-line camelcase