use same docker image in every step of development process

[tdevilleduc]

I want also to use the same docker image for each deployment step
And i would like to use openjdk:11.0.4-jre-slim because its smaller

openjdk:11.0.4-jre-slim - 204MB
registry.access.redhat.com/openjdk/openjdk-11-rhel7:1.0-13 - 494MB