version: '3'

services:
  gerbil:
    image: gerbil
    container_name: gerbil
    cap_add:
      - NET_ADMIN
      - SYS_MODULE
    volumes:
      - ./config:/config
    ports:
      - 51820:51820/udp
    sysctls:
      - net.ipv4.conf.all.src_valid_mark=1
    restart: unless-stopped