ADDED standalone.js script to inject standalone mode in dev server

README.md

@@ -63,6 +63,3 @@ Jellyfin Web is the frontend used for most of the clients available for end user
    yarn serve
    ```
 
-The webpack dev server will proxy backend requests to http://localhost:8096 - so
-you'll need to start a jellyfin backend either via docker or by running
-the application in the jellyfin main repository.

src/standalone.js

@@ -0,0 +1,4 @@
+(function() {
+    "use strict";
+    window.appMode='standalone';
+})();

webpack.dev.js

@@ -30,14 +30,7 @@ module.exports = merge(common, {
         }),
         new ConcatPlugin({
             name: 'scripts/apploader.js',
-            filesToConcat: ['./scripts/apploader.js']
+            filesToConcat: ['./standalone.js', './scripts/apploader.js']
         })
-    ],
-    devServer: {
-        proxy: {
-            "!/**/*.html" : "http://localhost:8096",
-            "!/**/*.css" : "http://localhost:8086",
-            "!/**/*.js" : "http://localhost:8086"
-        }
-    }
+    ]
 });