Alpine image is not working

Hi there,
I am using duckling as a docker image with debian, and it is working perfectly. But I wanted to use it with Alpine distro. I prepare dockerfile for it. But it got some errors. And i just fix some of them. But now although i have timezone Greenwich at usr/shared/Greenwich and copied it to etc/localtime. (RUN cp /usr/share/zoneinfo/Greenwich /etc/localtime) it keeps giving me error :
**duckling-example-exe: /usr/share/zoneinfo/Greenwich: invalid timezone file: no timezone found in OlsonData**
It is not accepting OlsonData in Alpine i guess.

Start by reproducing the error from the reported Alpine Dockerfile and inspect how duckling-example-exe handles /usr/share/zoneinfo/Greenwich and /etc/localtime. Compare the Alpine image behavior with the working Debian image; done means the Alpine-based Docker image starts without the invalid timezone file error.

Written by the indexing model from the issue text.