feat(ingest) - clean expired ingest content.

Refactored the ingest commands in separate files.
docker: added initial infrastructure
fix(docker): start_container script
fix(docker: start_container): hardcoded host ip
Merge pull request #234 from amagdas/clean-expired

feat(ingest) - clean expired ingest content.
fix(docker: start_container): forwared websockets' port
Merge remote-tracking branch 'yauhen/docker'
fix(docker): install libjpeg for pillow