Fails to start with "ConnectionError: The session was terminated unexpectedly" if 5432 already taken

[NathanFlurry]

Symptoms

Get this error when running opengb dev

Steps to reproduce

1. Run any postgres server on port 5432

docker run -p 5432:5432 --name some-postgres -e POSTGRES_PASSWORD=mysecretpassword -d postgres

1. Run opengb dev
2. Crashes

Resolution

Find a free port to run Postgres on.