squirrel cache

vercel.json

@@ -1,3 +1,6 @@
 {
-  "cleanUrls": true
+  "buildCommand": "mkdir -p node_modules/cache && ln -s node_modules/cache docs/.observablehq && rm -rf dist && observable build",
+  "outputDirectory": "dist",
+  "cleanUrls": true,
+  "framework": null
 }