c script -- only set PGUSER and PGHOST if not already set, which will make it possible to use "npm run c" on cocalc-docker
c script -- only set PGUSER and PGHOST if not already set, which will make it possible to use "npm run c" on cocalc-docker

sagemathinc/smc,sagemathinc/smc,sagemathinc/smc,sagemathinc/smc