Build Dockerfile with e.g.:
$ docker build -t gemma_db .

Get a running instance with e.g.:
$ docker run --name gemma_db -d -p 54321:5432 -v $PWD:/opt/gemma gemma_db

Run tests for RLS policies:
$ docker exec gemma_db ./run_tests.sh

Create ER diagrams with e.g.:
Auxiliary tables:
$ postgresql_autodoc -p 54321 -h $dockerhost \
      -d gemma -U sophie --password=so2Phie4 -t dot -l . -s 'gemma'
$ dot -Tpdf gemma.dot > gemma_auxiliary.pdf

Waterway related tables:
$ postgresql_autodoc -p 54321 -h $dockerhost \
      -d gemma -U sophie --password=so2Phie4 -t dot -l . -s 'gemma_waterway'
$ dot -Tpdf gemma.dot > gemma_waterway.pdf

Fairway/bottleneck related tables:
$ postgresql_autodoc -p 54321 -h $dockerhost \
      -d gemma -U sophie --password=so2Phie4 -t dot -l . -s 'gemma_fairway'
$ dot -Tpdf gemma.dot > gemma_fairway.pdf