message: don't use perf API inside container
  perf API for core metrics does not work as expected inside PCM container.
  Also clear core PMU when starting the container.
diff: @@ -6,5 +6,6 @@ RUN cd /tmp/pcm && make
  FROM fedora:31
  COPY --from=builder /tmp/pcm/*.x /usr/local/bin/
  +ENV PCM_NO_PERF=1
  -ENTRYPOINT [ "/usr/local/bin/pcm-sensor-server.x", "-p", "9738" ]
  +ENTRYPOINT [ "/usr/local/bin/pcm-sensor-server.x", "-p", "9738", "-r" ]
  