chore(docs): document additional way to manually install Next.js Runtime (#1813)

Author: hrishikesh-k

README.md

@@ -44,7 +44,7 @@ by targeting the `/_next/image/*` route:
 
 ## Disabling included image loader
 
-If you wish to disable the use of the image loader which is bundled into the runtime by default, set the `DISABLE_IPX` environment variable to `true`. 
+If you wish to disable the use of the image loader which is bundled into the runtime by default, set the `DISABLE_IPX` environment variable to `true`.
 
 This should only be done if the site is not using `next/image` or is using a different loader (such as Cloudinary or Imgix).
 
@@ -60,7 +60,7 @@ For more details on Next.js Middleware with Netlify, see the [middleware docs](h
 
 ### Limitations
 
-Due to how the site configuration is handled when it's run using Netlify Edge Functions, data such as `locale` and `defaultLocale` will be missing on the `req.nextUrl` object when running `netlify dev`. 
+Due to how the site configuration is handled when it's run using Netlify Edge Functions, data such as `locale` and `defaultLocale` will be missing on the `req.nextUrl` object when running `netlify dev`.
 
 However, this data is available on `req.nextUrl` in a production environment.
 
@@ -107,7 +107,15 @@ Edge runtime or middleware is enabled it will also generate edge functions for m
 
 ## Manually installing the Next.js Runtime
 
-The Next.js Runtime installs automatically for new Next.js sites on Netlify. You can also install it manually like this:
+The Next.js Runtime installs automatically for new Next.js sites on Netlify. You can also install it manually in the
+following ways:
+
+### From the UI (Recommended):
+
+You can go to the [UI](https://app.netlify.com/plugins/@netlify/plugin-nextjs/install) and choose the site to install the Next.js Runtime on. This method
+is recommended because you will benefit from auto-upgrades to important fixes and feature updates.
+
+### From `npm`:
 
 ```shell
 npm install -D @netlify/plugin-nextjs
@@ -117,9 +125,11 @@ npm install -D @netlify/plugin-nextjs
 
 ```toml
 [[plugins]]
-package = "@netlify/plugin-nextjs"
+  package = "@netlify/plugin-nextjs"
 ```
 
+This method is recommended if you wish to pin the Next.js Runtime to a specific version.
+
 ## Manually upgrading from an older version of the Next.js Runtime
 
 If you previously set these values, they're no longer needed and should be removed:
@@ -139,7 +149,7 @@ information on changes to how they are handled in this version. In particular, n
 files must be placed in `public`, not in the root of the site.
 
 ## Using with pnpm
-If your site uses pnpm to manage dependencies, currently you must [enable public hoisting](https://pnpm.io/npmrc#public-hoist-pattern). 
+If your site uses pnpm to manage dependencies, currently you must [enable public hoisting](https://pnpm.io/npmrc#public-hoist-pattern).
 The simplest way to do this is to create a `.npmrc` file in the root of your project with the content:
 
 ```ini