Loads whole file into memory while uploading to backend

[sexnine]

Especially when uploading large files on memory-limited systems, the backend will try allocating a lot of memory for the file and can panic if there is not enough memory, causing the upload to be incomplete and downcat to crash.

For some reason, the file's data is not being freed from memory until the whole file has been written to disk.

Possible solutions for this issue:

• Freeing memory while parts of the file is written
• Limiting the request so only a certain amount can be in memory at one time.

Unfortunately, I've tried to implement these solutions but I'm too dumb to solve them :)

[aryabp]

Okei dokei