Ubuntu setup for multi-site wordpress hosting

setup.sh

# 1. Install Docker (https://get.docker.com/)
curl -fsSL https://get.docker.com -o install-docker.sh
sudo sh install-docker.sh

# 2. Setup Caddy
mkdir -p caddy
cd caddy
mkdir -p conf

nano conf/Caddyfile
# Start of Caddyfile
mysite.eu {
        reverse_proxy 172.17.0.1:8000
}
# End of Caddyfile

nano docker-compose.yml
# Start of docker-compose.yml
services:
  caddy:
    image: caddy:2.9.1
    restart: unless-stopped
    cap_add:
      - NET_ADMIN
    ports:
      - "80:80"
      - "443:443"
      - "443:443/udp"
    volumes:
      - $PWD/conf:/etc/caddy
      - $PWD/site:/srv
      - data:/data
      - config:/config
volumes:
  data:
  config:
# End of docker-compose.yml

docker compose up -d

# To reload Caddy in future
docker compose exec -w /etc/caddy caddy caddy reload

cd ..

# 3. Setup wordpress

mkdir -p site1
cd site1

nano docker-compose.yml
# Start of docker-compose.yml
services:
  db:
    # We use a mariadb image which supports both amd64 & arm64 architecture
    image: mariadb:10.6.4-focal
    # If you really want to use MySQL, uncomment the following line
    #image: mysql:8.0.27
    command: '--default-authentication-plugin=mysql_native_password'
    volumes:
      - db:/var/lib/mysql
    restart: always
    environment:
      - MYSQL_ROOT_PASSWORD=somewordpress
      - MYSQL_DATABASE=wordpress
      - MYSQL_USER=wordpress
      - MYSQL_PASSWORD=wordpress
  wp:
    ports:
      - 8000:80
    image: wordpress:6.6.2-php8.3-apache
    restart: always
    environment:
      - WORDPRESS_DB_HOST=db
      - WORDPRESS_DB_USER=wordpress
      - WORDPRESS_DB_PASSWORD=wordpress
      - WORDPRESS_DB_NAME=wordpress
volumes:
  db:
# End of docker-compose.yml

docker compose up -d

# 4. Connect domain
# Configure A DNS record to point to IP of server