This change is used to generalize a template docker-compose file for all
modules. Ideally, the leaf module only need to keep a docker compose
file for all platforms (docker-compose.yml).
NOTE:
The version of docker-compose file downgrades from 3.4 to 2.1 because
the 'extends' keyword is not supported in Compose version 3.x.
Change-Id: I2e36fd9236eda86cb5fcf940d787ccefe9200696
Reviewed-by: Maurice Kalinowski <maurice.kalinowski@qt.io>
