fix bug: #46

Dockerfile

@@ -7,7 +7,7 @@ RUN echo insecure >> ~/.curlrc
 
 RUN \
   curl -Lks https://bintray.com$(curl -Lk http://bintray.com/chrislusf/Weed-FS/seaweed/_latestVersion | grep linux_amd64.tar.gz | sed -n "/href/ s/.*href=['\"]\([^'\"]*\)['\"].*/\1/gp") | gunzip | tar -xf - -C /opt/weed/ && \
-  mv weed_* bin && \
+    mv weed_*/* /bin && \
   chmod +x ./bin/weed
 
 EXPOSE 8080
@@ -18,4 +18,4 @@ VOLUME /data
 ENV WEED_HOME /opt/weed
 ENV PATH ${PATH}:${WEED_HOME}/bin
 
-ENTRYPOINT ["weed"]
+ENTRYPOINT ["weed"]