updating the documentation of the SilverLinux Insftracture

docs/backups.md

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+# Backups
+
+## Overview
+
+This document describes the backup strategy for SilverLinux.
+
+The goal is to ensure that all critical services can be restored after hardware failure, accidental deletion, corruption, or disaster recovery scenarios.
+
+---
+
+## Backup Priorities
+
+### Critical
+
+These items must always be backed up.
+
+#### PostgreSQL
+
+Contains:
+
+* OpenProject database
+* Gitea database
+* Future application databases
+
+Importance:
+
+Critical
+
+---
+
+#### Gitea Data
+
+Location:
+
+```text
+/srv/docker/gitea/data
+```
+
+Contains:
+
+* Git repositories
+* Attachments
+* Configuration
+* User data
+
+Importance:
+
+Critical
+
+---
+
+#### OpenProject Assets
+
+Location:
+
+```text
+/srv/docker/openproject/assets
+```
+
+Contains:
+
+* Attachments
+* Uploaded files
+* User generated content
+
+Importance:
+
+Critical
+
+---
+
+#### Shared Secrets
+
+Location:
+
+```text
+/srv/secrets/company.env
+```
+
+Contains:
+
+* SMTP credentials
+* PostgreSQL passwords
+* OpenProject secrets
+* Future OAuth secrets
+
+Importance:
+
+Critical
+
+Without this file applications may not start correctly.
+
+---
+
+#### Nginx Proxy Manager
+
+Locations:
+
+```text
+/srv/docker/nginx-proxy-manager/data
+/srv/docker/nginx-proxy-manager/letsencrypt
+```
+
+Contains:
+
+* Proxy configuration
+* SSL certificates
+* Domain routing
+
+Importance:
+
+Critical
+
+---
+
+### Medium Priority
+
+#### Portainer
+
+Volume:
+
+```text
+portainer_portainer_data
+```
+
+Contains:
+
+* Portainer users
+* Portainer configuration
+* Stack definitions
+
+Importance:
+
+Medium
+
+Can be recreated if necessary.
+
+---
+
+#### Jitsi Configuration
+
+Location:
+
+```text
+/srv/docker/jitsi
+```
+
+Contains:
+
+* Jitsi configuration
+* Internal authentication configuration
+
+Importance:
+
+Medium
+
+---
+
+## Backup Storage
+
+Current Location:
+
+```text
+/srv/backups
+```
+
+Suggested Structure:
+
+```text
+/srv/backups/
+├── daily
+├── weekly
+└── monthly
+```
+
+---
+
+## Retention Policy
+
+### Daily
+
+Keep:
+
+```text
+7 days
+```
+
+### Weekly
+
+Keep:
+
+```text
+4 weeks
+```
+
+### Monthly
+
+Keep:
+
+```text
+12 months
+```
+
+---
+
+## Restore Priorities
+
+Restore order:
+
+1. PostgreSQL
+2. Shared secrets
+3. Nginx Proxy Manager
+4. Gitea
+5. OpenProject
+6. Portainer
+7. Jitsi
+
+---
+
+## Disaster Recovery Checklist
+
+### Step 1
+
+Install:
+
+* Ubuntu Server
+* Docker
+* Docker Compose
+
+### Step 2
+
+Restore:
+
+```text
+/srv/secrets/company.env
+```
+
+### Step 3
+
+Restore:
+
+```text
+/srv/docker
+```
+
+data directories.
+
+### Step 4
+
+Restore PostgreSQL databases.
+
+### Step 5
+
+Deploy Docker stacks.
+
+### Step 6
+
+Verify:
+
+* DNS
+* SSL certificates
+* Email delivery
+* Application access
+
+---
+
+## Related Documentation
+
+* docs/server.md
+* docs/security.md
+* docs/secrets.md
+* postgres/README.md
+* gitea/README.md
+* openproject/README.md