Backup script

[ckcollab]

@ mention of reviewers

@gibsonbailey

Resolves #139

A checklist for hand testing

• ./bin/pg_dump.sh works local, saves file to minio private storage /backups dir
• (if we switch branch on prod to this and run the script) On prod storage backups are being saved from cron job
• Few commands added:

• ./manage.py list_backups <search>
• ./manage.py download_backup <dump name from above search>
• ./bin/pg_restore.sh <dump name from download>

Checklist

• Code review by me
• Hand tested by me
• I'm proud of my work
• Code review by reviewer
• Hand tested by reviewer
• Ready to merge

[gibsonbailey]

The code looks good, and it works great! However, I think it would be much more usable if we had a two other commands:

1. List dumps that exist in the backups directory
2. Load an existing backup dump by name

It's not necessarily difficult to use, but it requires the usage of the minio client which CAN be irritating to set up.

Also, thank you for building this 🙏.

[ckcollab]

I added the commands...

./manage.py list_backups <search>
./manage.py download_backup <dump name from above search>
./bin/pg_restore.sh <dump name from download>

Also made everything private by default .. but all current File/ImageFields should be public anyway. Protects us in the future if someone makes an oversight, something we want to be private won't be public by accident (hopefully!)

EDIT: Merged in conflicts, looks like PublicStorage was already added with explicit S3 stuff, I think the way I did it should work OK locally? can you confirm @brendon-lind ?