BAEL-54445 reorganize docker modules

docker-modules/dockerfile/README.md

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+## Relevant Articles:
+
+- [Dockerfile Strategies for Git](https://www.baeldung.com/ops/dockerfile-git-strategies)

docker-modules/dockerfile/git-strategies/.gitmodules

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+[submodule "project"]
+  path = project
+  url = https://github.com/eugenp/tutorials.git
+  branch = master

docker-modules/dockerfile/git-strategies/Dockerfile

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+ADD . /project/
+ADD /build/ /project/
+ADD /output/project.jar /project/
+
+ADD ssh-private-key /root/.ssh/id_rsa
+RUN git clone git@github.com:eugenp/tutorials.git
+
+ARG username=$GIT_USERNAME
+ARG password=$GIT_PASSWORD
+RUN git clone https://username:password@github.com:eugenp/tutorials.git
+
+VOLUME /build/ /project/
+