support for mime type application/octet-stream

[emplexity]

Is your feature request related to a problem? Please describe.
when uploading a picture to be inserted in a private DM (NIP17) the upload fails because the media server does not support the mime type application/octet-stream mime type
Describe the solution you'd like
As the mime type is not in the nip-96.json available under https://domainname/.well-known/nostr/nip96.json , the version version 0.7.0.3128 of the nostrcheck server might not support it. The server should allow to upload this mime type as a blob without any resizing option.

Describe alternatives you've considered
none as the need is to upload the encrypted picture

Additional context
Add any other context or screenshots about the feature request here.