docker-compose.yml

# File: docker-compose.yml
# A minimal docker-compose stack to have adguardhome running on a machine with docker installed.
version: "3.9"

volumes:
  adguard:
  
services:
  adguard:
    restart: always
    image: adguard/adguardhome:latest
    container_name: adguard
    volumes:
      - adguard:/opt/adguardhome
    ports:
      - 53:53/tcp
      - 53:53/udp
      # If server is remote: DO NOT ADMIN PORTS
      - 127.0.0.1:3000:3000/tcp
      - 127.0.0.1:80:80/tcp
      # Only if server is inside home:
      # - 3000:3000/tcp
      # - 80:80/tcp

  # This is optional: to keep the adguardhome always up-to-date
  watchtower:
    image: containrrr/watchtower
    restart: always
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - /etc/localtime:/etc/localtime:ro
    environment:
      - WATCHTOWER_CLEANUP=true

instructions.md

Step-1: Install docker with convenient one-liner script

from: https://github.com/docker/docker-install

curl -fsSL https://get.docker.com -o get-docker.sh
sh get-docker.sh

Step-2: Download & place the attached minimal docker-compose file on server.

Change some params to your liking: Reference

Step 3: Start & configure via web

# Start the docker compose stack & forget about it!
docker compose up -d

goto http://<machine-IP>:3000 to configure the installation over web. If server is outside home - use port forwarding over ssh -L 3000:localhost:3000.

Step 4: Configure DNS: On your router's settings set the DNS to the machine-IP.

If this does not work, then individually goto wifi settings on phone/computer to set manual DNS. Google how to change DNS for your device.