Docker and podman - Githubissues

Added dockermgr.py which uses Docker Engine (or Podman) API (without swarm mode)
Added a feature where STOREBASE can be detected from a local volume automatically
CONTAINER_ENV=docker STORAGE_TYPE=docker_local_volume are the new defaults (instead of CONTAINER_ENV=swarm STORAGE_TYPE=host)
- new defaults enable (near) zero-config deployment (still need to provide SECRET_KEY)
Added setting CONTAINER_USER, which replaces SECURITYCONTEXT_RUNAS_USER and SECURITYCONTEXT_RUNAS_GROUP (backwards incompatible)
Added setting ENABLE_HOME_WORKAROUND for working around bugs where CONTAINER_USER is underprivileged

See the changes to README.md for thoughts on deployment

FNNDSC / pman