Attic deduplicating backup program. You can specify ssh configuration using volumes:
If you want to use sshfs so that a remote machine does not need to have attic installed you can specify the sshfs mount using an environment variable SSHFS and it will be mounted at /sshfs. Of course, in order to use sshfs the docker container must be privileged. You can specify ssh options with the SSHOPTS environment variable (whitespace separated). As a shortcut, SSHFAST will make the ssh mount as fast as possible at the expense of anything else (so that you do not need to figure out the correct options yourself).