As a student, I want to be able to remove an image / file from my submission. As a developer, I want deleted images to be removed from the filesystem.

[billdybas]

Frontend:

• Add a "X" button to the Dropzone image preview, which when clicked, removes the preview and sends a DELETE request to the backend to remove that image from the file system
• Also, when there is already an image preview and a different image is uploaded, a DELETE request should be sent.

Backend:

• Accept DELETE requests on uploads. The request sends the "path" and then removes the file from the filesystem – sends a 204 No Content on success. If the file doesn't exist, still send a 204 since the intent (not having the file) is technically fulfilled.

[robmcl4]

delete unused temp files on backend on timer