A simple, containerized web UI for nihui/waifu2x-ncnn-vulkan.
POST /requests -> 202 returns a transaction ID -> 503 if queue is full
GET /requests/status -> 200 returns status of all transactions
GET /requests/{transactionId}/status -> 404 if missing -> 200 with body explaining status
GET /requests/{transactionId}/output -> 404 if missing -> 200 with image
DELETE /requests/{transactionId} (TODO in the future) -> 404 if missing -> 204 if successful