lemmy docker-compose bug

docker-compose.yml

version: '3.3'

services:
  lemmy_db:
    image: postgres:12-alpine
    environment:
      - POSTGRES_USER=lemmy
      - POSTGRES_PASSWORD=secret
      - POSTGRES_DB=lemmy
    volumes:
      - lemmy_db:/var/lib/postgresql/data
    restart: always
    networks:
        backend:
            ipv4_address: 172.16.238.11
  lemmy:
    image: dessalines/lemmy:v0.6.18
    ports:
      - "127.0.0.1:8536:8536"
    restart: always
    volumes:
      - ./lemmy.hjson:/config/config.hjson:ro
    depends_on:
      - lemmy_db
    networks:
        backend:
            ipv4_address: 172.16.238.10
        frontend:
    extra_hosts:
        - "lemmy_db:172.16.238.11"
        - "lemmy_pictshare:172.16.238.12"
  lemmy_pictshare:
    image: shtripok/pictshare:latest
    ports:
      - "127.0.0.1:8537:80"
    volumes:
      - lemmy_pictshare:/usr/share/nginx/html/data
    restart: always
    depends_on:
      - lemmy_db
    networks:
        backend:
            ipv4_address: 172.16.238.12
        frontend:
    extra_hosts:
        - "lemmy_db:172.16.238.11"
volumes:
  lemmy_db:
  lemmy_pictshare:

networks:
    frontend:
    backend:
        ipam:
            driver: default
            config:
                - subnet: "172.16.238.0/24"