Github user matyix commented on the issue:
https://github.com/apache/zeppelin/pull/2637
Hello @zjffdu @felixcheung- I have added docs about how to use/build this
PR as well. Also the Dockerfile has been removed, the documentation contains
details of using a third party (mine) or build your own Dockerfile - it was
added in the repo as a convenience, but due to licensing concerns I did remove
it. There was no particular reason why it was 1.7 (at the time I started to
work on this 1.8 was not released yet - and I usually waiting for the first
patch version until I switch).
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