Fix download images (#236)

* Fix download images

related to Visual-Regression-Tracker/Visual-Regression-Tracker#417

Author: pashidlos

src/main.ts

@@ -37,6 +37,10 @@ async function bootstrap() {
   // serve images
   app.useStaticAssets(join(process.cwd(), IMAGE_PATH), {
     maxAge: 31536000,
+    // allow cors
+    setHeaders: (res) => {
+      res.set('Access-Control-Allow-Origin', '*');
+    },
   });
 
   await app.listen(process.env.APP_PORT || 3000);