Install upstream knot package and configure chaperone to run kresd

Dockerfile

@@ -21,6 +21,8 @@ COPY --from=build /go/bin/shapeshifter-dispatcher /usr/local/bin/shapeshifter-di
 COPY --from=build /usr/sbin/openvpn /usr/sbin/openvpn
 COPY --from=build /go/bin/openvpn_exporter /usr/local/bin/openvpn_exporter
 COPY chaperone.d/ /etc/chaperone.d
+RUN echo "deb http://download.opensuse.org/repositories/home:/CZ-NIC:/knot-resolver-latest/Debian_10/ /" > /etc/apt/sources.list.d/knot.list
+COPY cznic-obs.gpg /etc/apt/trusted.gpg.d
 RUN apt-get -q update && env DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
         openvpn libcap2-bin netcat-openbsd iptables knot-resolver knot-resolver-module-http \
         && rm -rf /var/lib/apt/lists/*

chaperone.d/knot.conf

+knot-server.service: {
+     command: "/usr/sbin/kresd -c /etc/knot-resolver/kresd.conf -n /tmp",
+     exit_kills: true
+}