services:
  adguardhome:
    image: adguard/adguardhome
    security_opt:
      - apparmor:unconfined
    container_name: adguardhome
    ports:
      - 53:53/tcp
      - 53:53/udp
      - 784:784/udp
      - 853:853/tcp
      - 3000:3000/tcp
      - 80:80/tcp
      - 443:443/tcp
    volumes:
      - /docker/appdata/adguard/workdir:/opt/adguardhome/work
      - /docker/appdata/adguard/confdir:/opt/adguardhome/conf
    restart: unless-stopped

# Port 53 is being used at your host machine, that's why you can not bind 53 to host.
# To find what is using port 53 you can do: sudo lsof -i -P -n | grep LISTEN
# I'm a 99.9% sure that systemd-resolved is what is listening to port 53. To solve that you need to disable it. You can do that with these 2 commands:
# systemctl disable systemd-resolved.service
# systemctl stop systemd-resolved
# Now you have port 53 open, but no dns configured for your host. To fix that, you need to edit '/etc/resolv.conf' and add the dns address. 
# This is an example with a common dns address:
# nameserver 8.8.8.8
# If you have another nameserver in that file, I would comment it to prevent issues.
# Once pihole docker container gets running, you can change the dns server of your host to localhost, as you are binding port 53 to the host machine. 
# Change again '/etc/resolv.conf' like this
# nameserver 127.0.0.1