In order to run this image do:
docker-compose up -d
to get all up.
On first run DB initialization and initial user setup is done like so:
First start a bash in the container: docker-compose exec sentry /bin/bash
.
Then, inside bash, do sentry upgrade
wait until it asks you for an inital user.
When finished exit
the bash.
When in doubt check with docker-compose ps
if all went fine.