paweł gesek <> in tanzania-ui

Revert "disabled syncTransifex task in build"

This reverts commit 03e14cb8bc48e77c101962d1960e5880a0e3e474.

Set Docker image version to 1.13.1

Will prevent future build failures

Fix for building ref-ui image

Since the Dockerfile does not specify the version of the nginx

parent, we are at their mercy. Seems after some updates to nginx

and debian, gnupg is no longer installed with apt-get.

I added gnupg install to the Dockerfile, which solved the build issue

on systems that do not have old nginx versions present. However we should

most likely settle on an nginx version for stability.

OLMIS-1686: Added copyright headers