To test the ansible playbook on localhost run ansible-playbook -i test.inventory.ini dev.yaml.
In case you're missing the ansible docker dependency install it with ansible-galaxy collection install community.docker.
Point Redis Insights to the Redis database by visiting localhost:8001 in a browser and select "I already have a database" followed by "Connect to a Redis Database".
For host, port and name fill in oasst-redis, 6379 and redis.