FROM alpine:latest

RUN \
  apk --update upgrade && \
  apk add tini pdns pdns-backend-sqlite3

COPY rootfs /

HEALTHCHECK --interval=30s --start-period=5s --timeout=10s \
  CMD /usr/bin/host -T -p 1053 asperti.com 127.0.0.1

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