Update to Alpine 3.8 to fix alpine vulnerability #73
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Vulnerability:
https://justi.cz/security/2018/09/13/alpine-apk-rce.html
https://alpinelinux.org/posts/Alpine-3.8.1-released.html
NOTE Could not build/test because of #72 if someone could look at this issue it would be great as I have no experience with godep