Support deleting artifacts

[anbuc]

• What are you trying to do? Sending a DELETE request instead of an PUT request to delete the previously created artifact

• What feature or behavior is this required for? Remove artifacts that are no longer required and should no longer be available to download

• How could we solve this issue?

  • Adding a route for the DELETE request, supporting the same url as the PUT request
  • Delete the artifact that would have been created if it where a PUT request
  • Update package.json so requesting it leads to an error

[tagirb]

Would it be possible to support artifact deletion via Web UI as well?