Add next.config.js validation with ajv (#38498)

* Add next.config.js validation with ajv

* update manifest

* update lib type

* remove old tests

* update to pre-build validation code

* ensure validate output is ncced

* Apply suggestions from code review

Co-authored-by: Steven <steven@ceriously.com>

* Add example of typing next.config.js

Co-authored-by: Steven <steven@ceriously.com>

errors/invalid-next-config.md

@@ -0,0 +1,24 @@
+# Invalid next.config.js
+
+#### Why This Error Occurred
+
+In your `next.config.js` file you passed invalid options that either are the incorrect type or an unknown field.
+
+#### Possible Ways to Fix It
+
+Fixing the listed config errors will remove this warning. You can also leverage the `NextConfig` type by importing from `next` to help ensure your config is correct.
+
+```ts
+/**
+ * @type {import('next').NextConfig}
+ */
+const nextConfig = {
+  /* config options here */
+}
+
+module.exports = nextConfig
+```
+
+### Useful Links
+
+- [`next.config.js`](https://nextjs.org/docs/api-reference/next.config.js/introduction)

errors/manifest.json

@@ -711,6 +711,10 @@
         {
           "title": "node-module-in-edge-runtime",
           "path": "/errors/node-module-in-edge-runtime.md"
+        },
+        {
+          "title": "invalid-next-config",
+          "path": "/errors/invalid-next-config.md"
         }
       ]
     }

packages/next/index.d.ts

@@ -1,4 +1,5 @@
 /// <reference types="./types/global" />
+/// <reference path="./dist/styled-jsx-types/global.d.ts" />
 /// <reference path="./amp.d.ts" />
 /// <reference path="./app.d.ts" />
 /// <reference path="./config.d.ts" />
@@ -11,7 +12,6 @@
 /// <reference path="./router.d.ts" />
 /// <reference path="./script.d.ts" />
 /// <reference path="./server.d.ts" />
-/// <reference path="./dist/styled-jsx-types/global" />
 
 export { default } from './types'
 export * from './types'

packages/next/package.json

@@ -50,6 +50,7 @@
     "index.d.ts",
     "types/index.d.ts",
     "types/global.d.ts",
+    "types/compiled.d.ts",
     "image-types/global.d.ts"
   ],
   "bin": {
@@ -168,6 +169,7 @@
     "@vercel/ncc": "0.33.4",
     "@vercel/nft": "0.20.0",
     "acorn": "8.5.0",
+    "ajv": "8.11.0",
     "amphtml-validator": "1.0.35",
     "arg": "4.1.0",
     "assert": "2.0.0",