This is great. I wish there were more of this.
"Sharing" is only good if you can share through standard methods. Call APIs when sharing, share to arbitrary servers etc.
Nice work. I like the simplicity. That its OSS and thus can be (hopefully) used to build a more streamlined (ie preset URL) version is a nice bonus!
I made this! More background here: https://andybrett.com/writing/send-as-post
There could be a counterparty app that run a webserver to accept these POST requests and save the images.
If the parameters were editable people could use the app to share to imgur and other sites alike.