FROM alpine:latest

RUN \
  apk --no-cache upgrade && \
  apk --no-cache add tini curl pdns pdns-backend-sqlite3

COPY rootfs /

HEALTHCHECK --interval=30s --start-period=5s --timeout=10s \
  CMD curl http://127.0.0.1:8081/metrics

ENTRYPOINT ["/sbin/tini", "--", "/bin/sh", "/app/entrypoint.sh"]