finish file server

static/node_modules/uuid/dist/esm-node/version.js

@@ -0,0 +1,8 @@
+import validate from './validate.js';
+function version(uuid) {
+  if (!validate(uuid)) {
+    throw TypeError('Invalid UUID');
+  }
+  return parseInt(uuid.slice(14, 15), 16);
+}
+export default version;