message: docs: remove nextConfirDir requirement
diff: @@ -60,9 +60,9 @@ module.exports.render = (event, context, callback) => {
  `npm install --save-dev serverless-nextjs-plugin`
  -The plugin only needs to know where your `next.config.js` file is located. Using your next configuration it will automatically build the application and compile the pages using the target: `serverless`.
  +Out of the box, the plugin won't require any configuration. If you need to override any defaults check [this](#all-plugin-configuration-options).
  -Note it expects `nextConfigDir` to be a directory and not the actual file path.
  +For example:
  ```
  nextApp
  