Implement SFTP service
Target is that on master node (role==manager), there is a service providing SFTP (FTP via SSH) access on an exposed port in internal network to a configured set of folders - currently:
- /data/from/fepd
- /data/to/panda
These folders should be accessible as volumes for other components on master node (ingestor & optimally also registrar for export when new product registered)
A premade docker image should be used
#20 (closed) and #7 (closed) partly depend on it