docker-compose lan only wireguard

docker-compose.yaml

version: "3.8"
services:
  wg-easy:
    environment:
      - WG_HOST=1.1.1.1
      - PASSWORD=password
      - WG_ALLOWED_IPS=10.8.0.0/24
      - WG_POST_UP=iptables -I FORWARD -i %i -d 0.0.0.0/0 -j DROP && iptables -I FORWARD -i %i -d 10.8.0.0/24 -j ACCEPT
    image: weejewel/wg-easy
    container_name: wg-easy
    volumes:
      - ./:/etc/wireguard
    ports:
      - "51820:51820/udp"
      - "51821:51821/tcp"
    cap_add:
      - NET_ADMIN
      - SYS_MODULE
    sysctls:
      - net.ipv4.ip_forward=1
      - net.ipv4.conf.all.src_valid_mark=1