Erlang

For local development it is usually a practise to spawn test containers on a local machine and run them all the time during development.
Also embedded broker/server is also an option, but RabbitMQ and Postgres don’t offer embedded solutions out of the box and setting a custom one would take too much time.
So what you can easily do is spawn local short lived docker containers with these technologies. 
A good and tested solution to this problem is using the Testcontainers test dependency. Test containers
So, with provided RabbitMQ and Postgres images, you just launch containers on Test Suite start and they get automatically destroyed on shutdown.