fix: set allowed origin methods to POST, GET, OPTIONS

Author: jszuminski

lib/server/server.js

@@ -43,7 +43,11 @@ const app = express();
 app.disable('x-powered-by');
 
 // Enable CORS support
-app.use(cors());
+app.use(
+  cors({
+    methods: ['POST', 'GET', 'OPTIONS']
+  })
+);
 
 // Enable parsing of form data (files) with Multer package
 const storage = multer.memoryStorage();