Downgrade to Yarn 1 for Heroku build

Su Yeon Lee · Su Yeon Lee · commit f258a44c2759 · 2025-09-22T12:09:59.000-04:00
diff --git a/package.json b/package.json
@@ -70,5 +70,5 @@
     "ts-node-dev": "^2.0.0",
     "typescript": "^4.5.5"
   },
-  "packageManager": "yarn@4.4.1"
+  "packageManager": "yarn@1.22.22"
 }
