[Feature] Encryption

[cinderblockgames]

The feature

If I let others onto my instance, it would be nice to be able to assure them that I can't access their photos.

Obviously, this can wait until the app is a bit more stable, since having them plaintext is good for recovery if things change too quickly.

Platform

• Server
• Web
• Mobile

[bo0tzz]

Duplicate of #450