message: also define default target shared key
diff: @@ -21,6 +21,7 @@ RUN find "/fluentd" -exec chmod g+rw {} \;
  RUN find "/fluentd" -type d -exec chmod g+x {} +
  ENV LOGS_FORWARDER_SHARED_KEY=secret \
  + LOGS_FORWARDER_TARGET_SHARED_KEY=secret \
  LOGS_FORWARDER_PRIVATE_KEY_PASSPHRASE=amazing1
  ENTRYPOINT ["/bin/entrypoint.sh"]
  