chore: fix nx demo

Author: ascorbic

demos/nx-next-monorepo-demo/package-lock.json

@@ -9,6 +9,7 @@
   },
   "private": true,
   "dependencies": {
+    "@netlify/plugin-nextjs": "file:plugin-wrapper",
     "@nrwl/next": "14.7.11",
     "core-js": "^3.6.5",
     "next": "12.3.1",
@@ -18,7 +19,6 @@
     "tslib": "^2.3.0"
   },
   "devDependencies": {
-    "@netlify/plugin-nextjs": "file:../../packages/runtime",
     "@nrwl/cli": "14.7.11",
     "@nrwl/cypress": "14.7.11",
     "@nrwl/eslint-plugin-nx": "14.7.11",

demos/nx-next-monorepo-demo/package.json

@@ -0,0 +1,5 @@
+# plugin-wrapper
+
+This empty plugin exists to ensure the demo sites can use `"@netlify/plugin-local-install-core"` to run `npm install`,
+which in turn builds the runtime package. This is needed because `npm install` isn't run in the site if the dependencies
+are unchanged.

demos/nx-next-monorepo-demo/plugin-wrapper/README.md

@@ -0,0 +1 @@
+module.exports = require("../../../packages/runtime")

demos/nx-next-monorepo-demo/plugin-wrapper/index.js

@@ -0,0 +1 @@
+name: '@netlify/plugin-nextjs'

demos/nx-next-monorepo-demo/plugin-wrapper/manifest.yml

@@ -0,0 +1,9 @@
+{
+  "name": "local-plugin",
+  "version": "1.0.0-alpha-local-wrapper",
+  "main": "index.js",
+  "license": "MIT",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  }
+}