docker.io images with EOS's built-time dependencies pre-installed

In order to speed up build time of our TravisCI test cases, docker images with the EOS build-time dependencies pre-installed are available over at the docker hub in eoshep/build-essentials. These are used as for CI testing as of commit 21f61a28. Even though it is a small annoyance that docker does not permit three-letter organization names, hence the eoshep name.

You can pull these images as you would pull any docker image using either

docker pull eoshep/build-essential:xenial

or

docker pull eoshep/build-essential:bionic

The source files for building these images are kept here. Please feel free to contribute your own docker files for whatever architecture you build EOS on.