updating the documentation of the SilverLinux Insftracture

docs/server.md

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+# Server Information
+
+## Overview
+
+SilverLinux is the primary self-hosted infrastructure server for Silver Solutions.
+
+The server hosts source control, project management, collaboration, communication and supporting infrastructure services.
+
+---
+
+## Host Information
+
+| Property         | Value                   |
+| ---------------- | ----------------------- |
+| Hostname         | silverlinux             |
+| Provider         | OVH                     |
+| Operating System | Ubuntu Server 24.04 LTS |
+| Public IP        | 51.255.83.140           |
+
+---
+
+## Hardware
+
+| Resource | Value                |
+| -------- | -------------------- |
+| CPU      | Intel Xeon-D 1520    |
+| Memory   | 32 GB RAM            |
+| Storage  | 2 × 480 GB SSD RAID1 |
+
+---
+
+## Installed Software
+
+### Docker
+
+Purpose:
+
+* Container hosting
+* Service isolation
+* Deployment management
+
+### Docker Compose
+
+Purpose:
+
+* Multi-container application deployment
+* Service management
+
+### PostgreSQL
+
+Purpose:
+
+* Shared database platform
+
+### Fail2Ban
+
+Purpose:
+
+* SSH brute-force protection
+
+### UFW
+
+Purpose:
+
+* Firewall management
+
+---
+
+## Docker Networks
+
+### internal
+
+Purpose:
+
+Private communication between services.
+
+Examples:
+
+* Gitea → PostgreSQL
+* OpenProject → PostgreSQL
+
+---
+
+### proxy
+
+Purpose:
+
+Public-facing services behind Nginx Proxy Manager.
+
+Examples:
+
+* Gitea
+* OpenProject
+* Jitsi Meet
+* Portainer
+
+---
+
+## Running Services
+
+* PostgreSQL
+* Gitea
+* OpenProject
+* Jitsi Meet
+* Portainer
+* Nginx Proxy Manager
+
+---
+
+## Directory Structure
+
+### Docker Services
+
+```text
+/srv/docker
+```
+
+Contains:
+
+```text
+/srv/docker/gitea
+/srv/docker/openproject
+/srv/docker/postgres
+/srv/docker/jitsi
+/srv/docker/portainer
+/srv/docker/nginx-proxy-manager
+```
+
+---
+
+### Shared Secrets
+
+```text
+/srv/secrets/company.env
+```
+
+Contains:
+
+* SMTP credentials
+* Database passwords
+* Application secrets
+* Future OAuth credentials
+
+---
+
+### Backups
+
+```text
+/srv/backups
+```
+
+Suggested structure:
+
+```text
+/srv/backups/daily
+/srv/backups/weekly
+/srv/backups/monthly
+```
+
+---
+
+## Service Data Locations
+
+### Gitea
+
+```text
+/srv/docker/gitea/data
+```
+
+---
+
+### OpenProject
+
+```text
+/srv/docker/openproject/assets
+```
+
+---
+
+### PostgreSQL
+
+```text
+/srv/docker/postgres/data
+```
+
+---
+
+### Nginx Proxy Manager
+
+```text
+/srv/docker/nginx-proxy-manager/data
+/srv/docker/nginx-proxy-manager/letsencrypt
+```
+
+---
+
+### Jitsi
+
+```text
+/srv/docker/jitsi
+```
+
+---
+
+## SSH Access
+
+Primary user:
+
+```text
+ubuntu
+```
+
+Authentication:
+
+* SSH key authentication
+* Root login disabled
+
+---
+
+## Security
+
+Implemented:
+
+* UFW enabled
+* Fail2Ban enabled
+* Shared secrets stored outside Git repositories
+* SSL certificates managed through Nginx Proxy Manager
+* PostgreSQL not exposed publicly
+* OpenID disabled in Gitea
+
+---
+
+## Email
+
+Sender address:
+
+```text
+noreply@silveressence.net
+```
+
+SMTP credentials are stored in:
+
+```text
+/srv/secrets/company.env
+```
+
+Used by:
+
+* Gitea
+* OpenProject
+
+---
+
+## Disaster Recovery
+
+This repository should contain enough information to rebuild the SilverLinux environment from scratch.
+
+Recovery priorities:
+
+1. Restore secrets
+2. Restore PostgreSQL
+3. Restore Nginx Proxy Manager
+4. Restore Gitea
+5. Restore OpenProject
+6. Restore remaining services
+
+---
+
+## Related Documentation
+
+* docs/secrets.md
+* docs/security.md
+* docs/backups.md
+* docs/services.md
+* docs/domains.md