[drbd-build-svr]: add logs

Author: sklyarevsky

images/drbd-build-server/werf.inc.yaml

@@ -89,7 +89,7 @@ docker:
   WORKDIR: /drbd
   EXPOSE: "2021"
   ENTRYPOINT: ["/usr/local/bin/drbd-build-server"]
-  CMD: ["-addr", ":2021"]
+  CMD: ["-addr", ":2021", "--log-level", "debug"]
   LABEL:
     distro: debian
     version: all