Support for multiple backup schedules per service

[remjx]

I would like to set up multiple backups, for example:

• 15 minute backups to Bucket A
• Daily backups to Bucket B
• Monthly backups to Bucket C

So that I can utilize S3 Storage Classes effectively with lifecycle rules.

Currently when setting dokku postgres:backup-schedule it only supports one scheduled backup rule at a time, so I have to choose either A, B, or C above. It would be awesome if I could have all 3 rules active.

[josegonzalez]

@markjackson02 What would the ux be for the commands in this case?

[remjx]

@josegonzalez was this issue accidentally moved into dokku-redis repo from dokku-postgres?

In any case, I was thinking the schedule command would remain the same, underneath adding an ID to the job. schedule-cat would show all jobs and their IDs for the given service. And lastly unschedule
would additionally take in the ID of the job to be unscheduled.

[josegonzalez]

I purposefully moved it because the redis repo is where I track issues that impact all datastores.