fix public release build failing for flipper-server

Summary: Fixed failing release build, see https://github.com/facebook/flipper/runs/4790065925?check_suite_focus=true.

Reviewed By: passy

Differential Revision: D33550553

fbshipit-source-id: ecbcfa77a29e1afb7815453bc53b66a46da9aa9f

desktop/scripts/build-flipper-server-release.ts

@@ -192,7 +192,6 @@ async function copyStaticResources(outDir: string) {
 
   // static folder, without the things that are only for Electron
   const staticsToCopy = [
-    'facebook',
     'icons',
     'native-modules',
     'PortForwardingMacApp.app',
@@ -206,6 +205,9 @@ async function copyStaticResources(outDir: string) {
     'index.web.html',
     'style.css',
   ];
+  if (isFB) {
+    staticsToCopy.push('facebook');
+  }
 
   await Promise.all(
     staticsToCopy.map((e) =>