Improve the readme.

changelog.md

@@ -32,7 +32,7 @@
 - Implemented a more reliable system based on a new `GraphQLAggregateError` class for throwing a GraphQL validation or execution aggregate error in the `execute` Koa middleware for special handling in the `errorHandler` Koa middleware.
 - Updated the `errorHandler` Koa middleware to overwrite an existing Koa context `response.body` if it’s not a suitable object when handling an error.
 - Configured Prettier option `singleQuote` to the default, `false`.
-- Documentation tweaks.
+- Improved documentation.
 - Added a `license.md` MIT License file.
 
 ## 8.0.0

readme.md

@@ -14,8 +14,19 @@ To install [`graphql-api-koa`](https://npm.im/graphql-api-koa) and the [`graphql
 npm install graphql-api-koa graphql
 ```
 
+Setup the Koa middleware in this order:
+
+1. [`errorHandler`](./errorHandler.mjs), to catch errors from following middleware for a correctly formatted [GraphQL response](https://spec.graphql.org/October2021/#sec-Errors).
+2. A [GraphQL multipart request](https://github.com/jaydenseric/graphql-multipart-request-spec) processor like `graphqlUploadKoa` from [`graphql-upload`](https://npm.im/graphql-upload), to support file uploads (optional).
+3. A request body parser like [`koa-bodyparser`](https://npm.im/koa-bodyparser).
+4. [`execute`](./execute.mjs), to execute GraphQL.
+
 See the [`execute`](./execute.mjs) middleware examples to get started.
 
+## Requirements
+
+- [Node.js](https://nodejs.org): `^14.17.0 || ^16.0.0 || >= 18.0.0`
+
 ## Exports
 
 These ECMAScript modules are published to [npm](https://npmjs.com) and exported via the [`package.json`](./package.json) `exports` field: