Set the right environment info for headless builds

Summary: The isHeadlessBuild flag was not properly set.

Reviewed By: antonk52

Differential Revision: D45728435

fbshipit-source-id: 3616c4358114d4f3d96372766dabf48b27b44333

desktop/flipper-server-core/src/server/startFlipperServer.tsx

@@ -39,6 +39,7 @@ export async function startFlipperServer(
   enableLauncherSettings: boolean,
   keytarModule: KeytarModule,
   type: FlipperServerType,
+  isHeadless: boolean,
 ): Promise<FlipperServerImpl> {
   const execPath = process.execPath;
   const appPath = rootDir;
@@ -53,7 +54,11 @@ export async function startFlipperServer(
     desktopPath = os.homedir();
   }
 
-  const environmentInfo = await getEnvironmentInfo(appPath, isProduction, true);
+  const environmentInfo = await getEnvironmentInfo(
+    appPath,
+    isProduction,
+    isHeadless,
+  );
 
   return new FlipperServerImpl(
     {