Fix homepage Traefik network routing and update configurations

- Add traefik.docker.network=traefik-network label to homepage service
- Prevent Traefik from using wrong IP from homelab-network
- Resolve 504 Gateway Timeout issues after authentication
- Update various docker-compose configurations and templates
- Clean up unused configuration files

docker-compose/core/.env.template

@@ -0,0 +1,28 @@
+# Environment Variables Template for Core Services
+# Copy this file to .env and fill in your values
+
+# User and Group IDs for file permissions (get with: id -u and id -g)
+PUID=1000
+PGID=1000
+
+TZ=America/New_York
+
+SERVER_IP=192.168.1.100
+SERVER_HOSTNAME=your-server-name
+
+# Domain & DuckDNS Configuration
+DUCKDNS_SUBDOMAINS=your-subdomain  # Without .duckdns.org
+DOMAIN=your-subdomain.duckdns.org
+DUCKDNS_TOKEN=your-duckdns-token-here
+
+# Default credentials (used by multiple services for easier setup)
+DEFAULT_USER=admin
+DEFAULT_PASSWORD=change-this-password
+
+# Authelia Configuration
+AUTHELIA_JWT_SECRET=your-jwt-secret-here
+AUTHELIA_SESSION_SECRET=your-session-secret-here
+AUTHELIA_STORAGE_ENCRYPTION_KEY=your-encryption-key-here
+
+# Let's Encrypt Configuration
+ACME_EMAIL=your-email@example.com