Microlink API: Better Errors

[Kikobeats]

• Simply errors to 3 HTTP Status Code: 200 (success), 400 (fail) & 500 (error).
• Add a more payload field to point addressable error link.
• Add a fallback error when we don't know how to resolve.

Related:

• ⭐️ https://blog.runscope.com/posts/6-common-api-errors
• https://rauchg.com/2016/addressable-errors
• https://github.com/zeit/err-sh

[Kikobeats]

Could be API response be improved as well?

{
  "status": "fail",
  "message": "\"foobar\" is not a valid HTTP URL. It should be have protocol (http or https)."
}

vs

{
  "status": "fail",
  "data": {
    "url": "\"foobar\" is not a valid HTTP URL. It should be have protocol (http or https)."
  }
  "message": "The petition was declined, check the errors above."
}