Add content type UI option for server-side Response step

[Apple]

@patrick

Change the action file directly, add a contentType as property. The action defaults to json content type.

{
  "name": "",
  "module": "core",
  "action": "response",
  "options": {
    "status": 200,
    "contentType": "text/plain",
    "data": ""
  }
}

Just had to do this for the 2nd time, bring it to the UI @George

[Apple]

Bump, I’m sure this takes 2 minutes to add to the UI? Unless you need to implement this for other server targets than NodeJS