Add Bitwarden, setup script, remove redundant files, update disk requirements, and add LinuxServer preference

- Add Vaultwarden (Bitwarden) password manager to utilities.yml
  - Self-hosted password manager with web UI
  - SMTP configuration for email notifications
  - Admin token for management
  - Access at bitwarden.${DOMAIN}
  - Protected by Authelia SSO

- Create automated first-run setup script (scripts/setup-homelab.sh)
  - Installs Docker Engine and Compose V2
  - Configures user groups (sudo, docker)
  - Enables SSH for remote management
  - Detects NVIDIA GPU and provides manual driver installation instructions
  - Creates directory structure and Docker networks
  - Comprehensive instructions for post-setup deployment

- Remove redundant compose files (now in core.yml)
  - Deleted authelia.yml, duckdns.yml, gluetun.yml, traefik.yml
  - All services consolidated into unified core.yml stack
  - Eliminates confusion and duplication

- Update disk space requirements across documentation
  - Changed from "100GB+ system, 1TB+ media" to:
  - "120GB+ system drive (NVMe or SSD highly recommended)"
  - "2TB+ for media & additional disks for services like Nextcloud"
  - Updated in README.md and getting-started.md

- Add preference for LinuxServer.io images
  - Updated copilot-instructions.md
  - LinuxServer images support PUID/PGID for proper file permissions
  - Preference noted in consistency guidelines

- Update core stack documentation
  - Emphasize unified core.yml deployment
  - Add both deployment methods (cd to directory vs full path)
  - Update getting-started.md with correct deployment steps
  - Note removal of separate stack files

- Add Bitwarden environment variables to .env.example
  - BITWARDEN_ADMIN_TOKEN, SIGNUPS_ALLOWED, INVITATIONS_ALLOWED
  - SMTP configuration for email notifications
  - Generation instructions included

- Update services-reference.md
  - Add Vaultwarden to utilities section (now 7 services)
  - Update service count and access URLs

All documentation now consistent with unified core stack approach and includes all requested features.

Co-authored-by: kelinfoxy <67766943+kelinfoxy@users.noreply.github.com>

README.md

@@ -32,6 +32,7 @@ The infrastructure uses Traefik for reverse proxy with automatic SSL, Authelia f
 - VS Code with GitHub Copilot extension (for AI assistance)
 - A domain from DuckDNS (free)
 - Surfshark VPN account (optional, for VPN features)
+- Sufficient disk space: 120GB+ system drive (NVMe or SSD highly recommended), 2TB+ for media & additional disks for services like Nextcloud that require lots of space
 
 ### Quick Setup (Dockge Structure)
 
@@ -62,31 +63,29 @@ The infrastructure uses Traefik for reverse proxy with automatic SSL, Authelia f
    docker network create media-network
    ```
 
-5. **Deploy core infrastructure (in order):**
+5. **Deploy core infrastructure stack:**
    ```bash
-   # 1. DuckDNS (Dynamic DNS)
-   mkdir -p /opt/stacks/duckdns && cp docker-compose/duckdns.yml /opt/stacks/duckdns/docker-compose.yml
-   cd /opt/stacks/duckdns && docker compose up -d
+   # Deploy the unified core stack (DuckDNS, Traefik, Authelia, Gluetun)
+   mkdir -p /opt/stacks/core
+   cp docker-compose/core.yml /opt/stacks/core/docker-compose.yml
+   cp -r config-templates/traefik /opt/stacks/core/
+   cp -r config-templates/authelia /opt/stacks/core/
    
-   # 2. Traefik (Reverse Proxy with SSL)
-   mkdir -p /opt/stacks/traefik/dynamic
-   cp docker-compose/traefik.yml /opt/stacks/traefik/docker-compose.yml
-   cp config-templates/traefik/* /opt/stacks/traefik/
-   cd /opt/stacks/traefik && docker compose up -d
+   # From within the directory
+   cd /opt/stacks/core && docker compose up -d
    
-   # 3. Authelia (SSO)
-   mkdir -p /opt/stacks/authelia
-   cp docker-compose/authelia.yml /opt/stacks/authelia/docker-compose.yml
-   cp config-templates/authelia/* /opt/stacks/authelia/
-   cd /opt/stacks/authelia && docker compose up -d
-   
-   # 4. Dockge (Stack Manager)
-   mkdir -p /opt/stacks/infrastructure
-   cp docker-compose/infrastructure.yml /opt/stacks/infrastructure/docker-compose.yml
-   cd /opt/stacks/infrastructure && docker compose up -d dockge
+   # OR from anywhere with full path
+   docker compose -f /opt/stacks/core/docker-compose.yml up -d
    ```
 
-6. **Access Dockge:**
+6. **Deploy infrastructure stack (includes Dockge):**
+   ```bash
+   mkdir -p /opt/stacks/infrastructure
+   cp docker-compose/infrastructure.yml /opt/stacks/infrastructure/docker-compose.yml
+   cd /opt/stacks/infrastructure && docker compose up -d
+   ```
+
+7. **Access Dockge:**
    Open `https://dockge.yourdomain.duckdns.org` (use Authelia login)
    
    Now deploy remaining stacks through Dockge's UI!