Backups for webapp database

[tomdoel]

The webapp database contains auditing data for the project classification process and should be preserved. Azure Database for PostgreSQL provides automatic backups, but it appears from the the documentation these share the server lifetime and so do not protect against the server being accidentally deleted.

Ideally an automated backup should be configured, which might encompass one or both of

• backup to long-term Azure storage (provisioned in a separate resource group and locked to prevent accidental deletion if the webapp resource group is removed)
• backups stored securely locally at the Turing by Turing IT

[tomdoel]

Needs input from IT about how they would want to manage backups