This build strategy lends itself to how Rockerfiles work. In the build
Dockerfile all the build utilities (e.g gcc, python) are installed and
run the build process to produce some build artifacts. There are two
build Dockerfiles, one for the nodejs part and one for the golang part.
The build artifacts of these are combined into the runtime Dockerfile.
For all this to work there is some minimal glue implemented in the
Makefile.
Part of this commit is a switch of the base image the runtime is based
on to the minimal OpenEmbedded one produced by #198
Signed-off-by: Petros Angelatos <petrosagg@gmail.com>
