Images here seem to wind up on void.cat.
What is the incentive situation and expected durability of these images?
Discussion
Upload the image on nostr.build and copy the url it gives you
https://nostr.build seems to be the most popular. He offers a premium tier that helps him fund the site.
Varies from client to client. Amethyst seems to use imgur.
I've seen some calls to use IPFS, but that has its own incentive problems.
TL;DR if you want aligned incentives then you should probably host your own images.
We should at least use a content hash based filename convention so the same file could be looked up from different hosts.
Nostr.build already does hash names:
https://nostr.build/i/ nostr.build_57d7f84a0d51fb6bfe97ad288dd6f54d1747ab2a915da56b8e2966a77e9f19bc.png.
But I think bech32 "file1234asdf..." would be even better.
Can chose anything. But over time likely we will see pay to host model. https://nostr.build/ already has a premium mode
catbox.moe was always the go-to in the past
Permanance is only required for a limited number of (i.e. paid) scenarios.