Changed RUN cmd: syntax wrong, added quotes to params.

Dockerfile-go-server

@@ -12,8 +12,7 @@ ADD bin/battlecamp-go-server /go/bin/battlecamp-go-server
 # either manually or with a tool like "godep".)
 # RUN go install battlecamp-go-server
 
-RUN ["mkdir /go"]
-RUN ["chown -R $HOST_UID:$HOST_GID /go"]
+RUN ["chown","-R","$HOST_UID:$HOST_GID","/go/bin/battlecamp-go-server"]
 
 # Run the battlecamp-go-server command by default when the container starts.
 ENTRYPOINT ["/go/bin/battlecamp-go-server"]