How to create a custom grader that runs PostgreSQL?

[jiayuasu]

Coursera custom grader only allows the grading process to be completed in ENTRYPOINT[executeGrader.sh].

Our assignment needs to write into PostgreSQL. There are several ways to start a PostgreSQL server after the fact: https://hub.docker.com/_/postgres/. Like: docker run XXXX

However, there is no way to start a PostgreSQL server in "executeGrader.sh". And the "executeGrader.sh" doesn't allow any sudo privilege.

Does this mean that it is not possible to use PostgreSQL in my custom grader?