Fix playground

scripts/build-docs.js

@@ -5,7 +5,7 @@
 const path = require("path");
 const shell = require("shelljs");
 
-const rootDir = path.join(__dirname, "..", "..");
+const rootDir = path.join(__dirname, "..");
 const staticDir = path.join(rootDir, "website/static");
 const docs = path.join(rootDir, "website/static/lib");