adding AWS - database backup/restore

[shaal]

The Problem/Issue/Bug

It's not possible to maintain consistent database across workspaces.

How this PR Solves The Problem

Add AWS commands:
.gitpod/aws/aws-backup.sh [backup_name]
.gitpod/aws/aws-restore.sh [backup_name]

Manual Testing Instructions

1. Create new Gitpod Environment variables through CLI (or directly in https://gitpod.io/variables)
   gp env AWS_ACCESS_KEY_ID=[ID]
gp env AWS_SECRET_ACCESS_KEY=[SECRET]
gp env AWS_DEFAULT_BUCKET=[BUCKET_NAME]
2. open a new workspace (or stop/start current workspace, for gp env to take effect)
3. Make some changes in current website.
4. Run aws-backup.sh testing123 (for a named backup)
5. Make additional changes in current website.
6. Run aws-backup.sh (for general backup, to be used later in Gitpod's future end-tasks)
7. Close workspace
8. Open a new workspace
9. Run aws-restore.sh testing123 (for restoring the named backup)
10. Confirm first changes are in the website, after its DB was restored.
11. Run aws-restore.sh (for restoring the latest backup available)
12. Confirm second changes are in the website, after its DB was restored.

Related Issue Link(s)

Release/Deployment notes

[gitpod-io]

[rfay]

Please add docs (or prompting?) equivalent to the PR manual testing instructions. I went straight to the PR expecting to see instructions there.

[mikenikles]

Elegant - the first word that came to mind 😄.

I'd love for this to be part of the new Gitpod Guides section we're working on (https://github.com/gitpod-io/website/issues/709) 🎉.

[rfay]

One interesting thought would be to add a docker volume plugin like https://github.com/muthu-r/horcrux - that would allow saving and restoring snapshots directly from S3 or minio. I haven't tried it. And that plugin doesn't look active.

On second thought, although that is recommended in https://docs.docker.com/engine/extend/legacy_plugins/ ... it doesn't actually look like it's ever had any activity in issues or PRs or anything.