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

config-templates/authelia/users_database.yml

@@ -3,10 +3,10 @@
 # Generate password hashes with: docker run authelia/authelia:latest authelia crypto hash generate argon2 --password 'yourpassword'
 
 users:
-  admin:
-    displayname: "Admin User"
-    password: "$argon2id$v=19$m=65536,t=3,p=4$GABqY9zhf83XWZQM5B8vlg$ADtVApDgotqKUb/sefku8hMYwRBDr5rqKIAuFghKzrM"  # Default password: admin123
-    email: admin@example.com
+  ${AUTHELIA_ADMIN_USER}:
+    displayname: "${AUTHELIA_ADMIN_USER}"
+    password: "${AUTHELIA_ADMIN_PASSWORD}"
+    email: "${AUTHELIA_ADMIN_EMAIL}"
     groups:
       - admins
       - users