Disable index hashing in development mode

When in Dev server mode, we the webpack dev server isn't capable of
understanding wildcards, and that index.html, and index.<hash>.html are
the same thing.

Disable the index file hashing when in dev mode.

Tested:
Launched dev server without bmc present.  Observed UI could be loaded
correctly.

Change-Id: Ie2d3bfe4af0117681cec8c92f93d7e278b2071f2
Signed-off-by: Ed Tanous <ed@tanous.net>

vue.config.js

@@ -70,10 +70,12 @@ module.exports = {
         name: '[name].[contenthash:8].[ext]',
       });
     config.plugins.delete('preload');
-    config.plugin('html').tap((options) => {
-      options[0].filename = 'index.[hash:8].html';
-      return options;
-    });
+    if (process.env.NODE_ENV === 'production') {
+      config.plugin('html').tap((options) => {
+        options[0].filename = 'index.[hash:8].html';
+        return options;
+      });
+    }
   },
   configureWebpack: (config) => {
     config.plugins.push(