services:
  karldns:
    build: .
    restart: unless-stopped
    env_file:
      - .env
    environment:
      DDNS_DATABASE: ${DDNS_DATABASE:-/data/ddns.sqlite3}
    ports:
      - "8080:8080"
    volumes:
      - karldns-data:/data
    # Keep the default single-worker command unless multi-worker rate limiting has been tested.
    healthcheck:
      test: ["CMD", "python", "-c", "import os, urllib.parse, urllib.request; host=urllib.parse.urlparse(os.environ['DDNS_PUBLIC_BASE_URL']).hostname; req=urllib.request.Request('http://127.0.0.1:8080/healthz', headers={'Host': host}); urllib.request.urlopen(req, timeout=2).read()"]
      interval: 30s
      timeout: 5s
      retries: 3

volumes:
  karldns-data: