Check out the document for the original graphile-worker:
https://github.com/graphile/worker/blob/master/README.md
If your DBA does not allow admin access to the database to install extensions and schema, nor would they pass you the name/pw to be put inside a NodeJS application.
In any case where the database setup needed to be decoupled with the nodejs application setup, you should use this fork.
Let your DBA setup the schema with their own admin account
cd sql
psql -f 000000.sql -v SCHEMA_NAME=my_worker_schema "postgresql://admin:admin@host:port/mydb"
psql -f 000001.sql -v SCHEMA_NAME=my_worker_schema "postgresql://admin:admin@host:port/mydb"
Lauch your NodeJs application with worker account (NOTE: make sure the account has access to the db mydb in this case)
npx graphile-worker -c "postgresql://worker:worker@host:port/mydb" -s my_worker_schema