Eliminar modo standalone y simplificar variables a solo ADMIN_TOKEN y TZ

docker-compose.yml

@@ -4,12 +4,7 @@ services:
     image: vaultwarden/server:latest
     restart: unless-stopped
     environment:
-      DOMAIN: ${DOMAIN}
-      SIGNUPS_ALLOWED: ${SIGNUPS_ALLOWED:-false}
       ADMIN_TOKEN: ${ADMIN_TOKEN}
-      WEBSOCKET_ENABLED: true
-      LOG_FILE: /data/vaultwarden.log
-      LOG_LEVEL: warn
       TZ: Europe/Madrid
     volumes:
       - vaultwarden_data:/data