use phased-restart to restart worker nodes 1-by-1
use phased-restart to restart worker nodes 1-by-1

phased-restart will allow connected clients to use the existing version
while puma restarts free workers to use a new version

nbargnesi/openbel-server,OpenBEL/openbel-api,OpenBEL/openbel-api,OpenBEL/openbel-api,nbargnesi/openbel-server,OpenBEL/openbel-server,OpenBEL/openbel-server,OpenBEL/openbel-server,OpenBEL/openbel-api,nbargnesi/openbel-server