I had to the following beyond the current instructions:
instead of just running setup-task-db.sh, do:
as root: mkdir /pgdata; chown postgres.postgres /pgdata/
as postgres:
run setup-task-db, the last 2 steps will fail
edit /pgdata/pg_hba.conf, uncomment
local all all
trust
host all all 127.0.0.1
255.255.255.255 trust
and comment
#local all all ident sameuser
execute
createdb -U tele task
psql -e task tele < task.sql