phxqueue docker tag was empty.

[wangxingge]

Issue as my title.
phxqueue docker tag was empty.

I executed cmd docker pull phxqueue/phxqueue with an issue: manifest for phxqueue/phxqueue:latest not found.

Then i check the tag of phxqueue, its empty...... :(

[wangxingge]

thanks for release docker image, i'd love to use docker, that's avoid lots deployment issue.