PostgreSQL 15.1 inside Docker with IPv6 support.

docker-comose.yml

version: '3.5'

# Tested with:
#
# $sudo docker --version
# Docker version 25.0.3, build 4debf41
#
# $sudo docker-compose --version
# docker-compose version 1.29.2, build 5becea4c
#
# /etc/docker/daemon.json
# {
#   "ipv6": true,
#   "fixed-cidr-v6": "2001:db8:1::/64",
#   "experimental": true,
#   "ip6tables": true
# }
#
# $sudo systemctl restart docker
#

services:
  postgres:
    container_name: postgres
    image: postgres:15.1-bullseye
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: postgres # TODO: change to your strong password!
      PGDATA: /data/postgres
#    volumes:
#       - postgres:/data/postgres
    ports:
      - "5432:5432"
    networks:
      - postgres
    restart: unless-stopped

networks:
  postgres:
    driver: bridge
    enable_ipv6: true
    ipam:
       config:
         - subnet: 2001:db8::/112