message: docs: update section on 502s
diff: @@ -746,6 +746,20 @@ module.exports = {
  };
  ```
  +### 502 Error when hitting CloudFront distribution
  +
  +You may see an error like below:
  +
  +```
  +502 ERROR
  +The request could not be satisfied.
  +The Lambda function returned invalid JSON: The JSON output is not parsable. We can't connect to the server for this app or website at this time. There might be too much traffic or a configuration error. Try again later, or contact the app or website owner.
  +If you provide content to customers through CloudFront, you can find steps to troubleshoot and help prevent this error by reviewing the CloudFront documentation.
  +Generated by cloudfront (CloudFront)
  +```
  +
  +It commonly occurs when the size of the response is too large. Lambda@Edge currently does have a limitation of 1 MB returned by the origin request handler. See: https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/lambda-generating-http-responses-in-requests.html#lambda-generating-http-responses-errors. Unfortunately, there may not be a workaround other than trying to ensure your responses are smaller.
  +
  ## Contributing
  Please see the [contributing](./CONTRIBUTING.md) guide.
  