Setup PostgreSQL following instructions for your operating system.
Set permissions on Postgres database. The following will trust all connections from the localhost, which is reasonable for a development machine, but may need to be changed for production.
$PGDATA/pg_hba.conf: # IPv4 local connections: host all all 127.0.0.1/32 trust
Initiate the archive database instance: pacsdb using create DDL script dcm4chee-psql-2.13.6/sql/create.psql
> export PGUSER=postgres > createdb pacsdb > psql pacsdb -f dcm4chee-psql-2.13.6/sql/create.psql