Support images by enabling binary payload

[dzimine]

Problem: images don't go through API Gateway even when they're in /assets and everything deployed and looking fine (even API Gateway "Test" works).

Directions: set up the binary payload in API Gateway http://docs.aws.amazon.com/apigateway/latest/developerguide/api-gateway-payload-encodings.html

Ask: make doing this a part of the plugin.

PS. If there's a better way, please share!

[lucasklaassen]

+1 I'm trying to return images from the s3 bucket through an api gateway GET endpoint.

From this article: https://stackoverflow.com/questions/42194162/aws-api-gateway-return-binary-file-from-base64-browser-error

It looks like we'll have to use the AWS CLI to change the setting contentHandling
to equal CONVERT_TO_TEXT