v1.3.1: Merge pull request #31 from moka-guys/graeme_dev
This release updates the runtime environment from Ubuntu 14.04, which is no longer supported, to Ubuntu 20.02. This fixes dependency issues which were preventing the app from working. This change also necessitated the following changes:
- tabix version upgraded to 1.10.2-3, the version available via apt-get on Ubuntu 20.04
- the legacy dx-docker utility, which is only supported on 14.04 runtime environments has been replaced with native docker commands.