Fix docs for next/image unconfigured hosts (vercel#41223)

Fix docs for next/image unconfigured hosts to mention `remotePatterns`.

errors/next-image-unconfigured-host.md

@@ -2,11 +2,29 @@
 
 #### Why This Error Occurred
 
-On one of your pages that leverages the `next/image` component, you passed a `src` value that uses a hostname in the URL that isn't defined in the `images.domains` config in `next.config.js`.
+One of your pages that leverages the `next/image` component, passed a `src` value that uses a hostname in the URL that isn't defined in the `images.remotePatterns` or `images.domains` in `next.config.js`.
 
 #### Possible Ways to Fix It
 
-Add the hostname of your URL to the `images.domains` config in `next.config.js`:
+Add the protocol, hostname, port, and pathname to the `images.remotePatterns` config in `next.config.js`:
+
+```js
+// next.config.js
+module.exports = {
+  images: {
+    remotePatterns: [
+      {
+        protocol: 'https',
+        hostname: 'example.com',
+        port: '',
+        pathname: '/account123/**',
+      },
+    ],
+  },
+}
+```
+
+If you are using an older version of Next.js prior to 12.3.0, you can use `images.domains` instead:
 
 ```js
 // next.config.js