Fix CMD in Dockerfile to use newest command line arguments
@@ -26,4 +26,4 @@ RUN cd $GOPATH/src/github.com/iotexproject/iotex-core/ && \
ln -s $GOPATH/src/github.com/iotexproject/iotex-core/config.yaml /etc/iotex/config.yaml && \
mkdir -p /var/log/iotex/
-CMD ["iotex-server", "-stderrthreshold=WARNING", "-log_dir=/var/log/iotex/server.log", "-config=/etc/iotex/config.yaml"]
\ No newline at end of file
+CMD ["iotex-server", "-log-path=/var/log/iotex/server.log", "-config=/etc/iotex/config.yaml"]
\ No newline at end of file
