Split docker-compose files and built in parallel

Created by: dtu-compute

Depends on #8 (closed).

Right now the docker-compose files are grouped in what made sense when using links.

If each container is its own file, when one can rebuild certain containers without taking others down, and it will allow to build containers in parallel with parallel --eta -j 8.

E.g.

docker-compose/getpdf.yml
docker-compose-generated/couchdb.yml

or perhaps

docker-compose/getpdf.yml
docker-compose/generated-couchdb.yml