website/docs: sys mgmt: document authentik backups/restoration (#12943)

* init

Signed-off-by: Dominic R <dominic@sdko.org>

* docs: sys mgmt: add backup documentation

* adapt command as you're already as root in postgres from what I tested and this is the easiest no-config-change solution that works

* Marc's comment

* href continuous archiving for pg

* add to sidebar

* restore documentation

* tana is gonna yell at me

* start

* static directories table fix my mess

* Update website/docs/sys-mgmt/ops/backup-restore.md

Signed-off-by: Dominic R <dominic@sdko.org>

* Update website/docs/sys-mgmt/ops/backup-restore.md

Signed-off-by: Dominic R <dominic@sdko.org>

---------

Signed-off-by: Dominic R <dominic@sdko.org>

website/sidebars.js

@@ -590,6 +590,7 @@ export default {
                         "sys-mgmt/ops/monitoring",
                         "sys-mgmt/ops/storage-s3",
                         "sys-mgmt/ops/geoip",
+                        "sys-mgmt/ops/backup-restore",
                     ],
                 },
                 {