Make sure icons are bundled

Summary: Make sure icons are prefetched for flipper-server prod builds, like we do for electron, so that the user doesn't need an internet connection to see icons

Reviewed By: nikoant

Differential Revision: D33296389

fbshipit-source-id: bfa92d78d8d77030238e5cca10d7aa6dcfb88e8b

desktop/flipper-ui-browser/src/initializeRenderHost.tsx

@@ -7,8 +7,8 @@
  * @format
  */
 
-import {FlipperServer, FlipperServerConfig} from 'flipper-common';
-import {RenderHost} from 'flipper-ui-core';
+import {FlipperServer, FlipperServerConfig, isProduction} from 'flipper-common';
+import type {RenderHost} from 'flipper-ui-core';
 
 export function initializeRenderHost(
   flipperServer: FlipperServer,
@@ -79,6 +79,12 @@ export function initializeRenderHost(
       // the 'static' folder is mounted as static middleware in Express at the root
       return '/' + path;
     },
+    getLocalIconUrl(icon, url) {
+      if (isProduction()) {
+        return `icons/${icon.name}-${icon.variant}-${icon.size}@${icon.density}x.png`;
+      }
+      return url;
+    },
   } as RenderHost;
 }