Use React on Rails default 'ssr-generated' for server bundle path

Per code review, use the documented default value 'ssr-generated' for
server_bundle_output_path instead of a custom path. This follows the
React on Rails 16 conventions and matches the framework defaults.

Author: justin808

.gitignore

@@ -54,8 +54,8 @@ lib/bs
 client/app/bundles/comments/rescript/**/*.bs.js
 
 # Server-side rendering bundles (private)
-app/assets/builds/
+# Using React on Rails default directory
+/ssr-generated/
 
 # Generated files
-client/app/generated/
-ssr-generated/
+/client/app/generated/

config/initializers/react_on_rails.rb

@@ -16,7 +16,8 @@
 
   # Server bundle output path for private SSR bundles (React on Rails 16+)
   # This keeps server bundles separate from public assets for security
-  config.server_bundle_output_path = "app/assets/builds"
+  # Using the default from React on Rails docs
+  config.server_bundle_output_path = "ssr-generated"
 
   # React on Rails 16 compatibility: Workaround for removed error handling
   #

config/webpack/serverWebpackConfig.js

@@ -46,13 +46,14 @@ const configureServer = () => {
   // Custom output for the server-bundle that matches the config in
   // config/initializers/react_on_rails.rb
   // Output to a private directory for SSR bundles (not in public/)
+  // Using the default React on Rails path: ssr-generated
   const path = require('path');
   serverWebpackConfig.output = {
     filename: 'server-bundle.js',
     globalObject: 'this',
     // If using the React on Rails Pro node server renderer, uncomment the next line
     // libraryTarget: 'commonjs2',
-    path: path.resolve(__dirname, '../../app/assets/builds'),
+    path: path.resolve(__dirname, '../../ssr-generated'),
     publicPath: config.publicPath,
     // https://webpack.js.org/configuration/output/#outputglobalobject
   };