add annubis support

[WolfgangFahl]

The ports 8081 and 9091 should be configurable.

  anubis:
    image: ghcr.io/techarohq/anubis:latest
    container_name: {{container_base_name}}-anubis
    restart: always
    ports:
      - "127.0.0.1:8081:8081"
    depends_on:
      - mw
    logging:
      driver: "json-file"
      options:
        max-size: "100m"
        max-file: "3"
    environment:
      BIND: ":8081"
      DIFFICULTY: "4"
      METRICS_BIND: ":9091"
      # Targets the internal wiki service on port 80
      TARGET: "http://mw:80"