Run backup on container startup

[MadsBen]

trafficstars

An option to run the backup at container startup would be nice. Nothing fancy, just a simple boolean true/false option.

It is useful when doing debugging or when setting up a new backup, that it creates a backup right away, instead of waiting for the schedule to run.

See resticker image for inspiration: https://github.com/djmaze/resticker/

[woolfg]

thanks for the proposal, I think it is quite useful, you are right. If you want to implement it, feel free to submit a PR.