docker-openstf-base

This is the Docker base image for openstf/stf. It's main purpose is to speed up build time, especially since the official Docker Hub doesn't cache layers. What sets it apart from the official Node.js images is that it's especially suited for building native extensions (sources needed by node-gyp are prefetched) and comes with a bit less bloat.

Additionally, native libraries and tools required by STF are installed here to further reduce build and pull times.