feat/#3 added a realm to import folder and updated docker-compose.yml

[pleszr]

closes #3

read readme for details

[csabika98]

Hello @pleszr !

Well done,

docker-compose.yml -> straightforward and clean

volumes:

• ./import:/opt/keycloak/data/import command: ["start-dev", "--import-realm"]

As I see it, we are attaching a volume to the container and importing the realms based on what we have in the import folder.