add min node version

README.md

@@ -23,7 +23,7 @@ Twitter: [@shoelace_style](https://twitter.com/shoelace_style)
 
 ## Shoemakers 🥾
 
-Shoemakers, or "Shoelace developers," can use this documentation to learn how to build Shoelace from source. You will need Node >= 14 to build and run the project locally. It is preferred, but not required, to use npm 7.
+Shoemakers, or "Shoelace developers," can use this documentation to learn how to build Shoelace from source. You will need Node >= 14.15 to build and run the project locally.
 
 **You don't need to do any of this to use Shoelace!** This page is for people who want to contribute to the project, tinker with the source, or create a custom build of Shoelace.
 

package.json

@@ -44,6 +44,9 @@
     "list-outdated-dependencies": "npm-check-updates --format repo --peer",
     "update-dependencies": "npm-check-updates --peer -u && npm install && npm run prettier && npm run verify"
   },
+  "engines": {
+    "node": ">=14.15.0"
+  },
   "dependencies": {
     "@lit-labs/react": "^1.0.1",
     "@popperjs/core": "^2.11.2",