Adding dockerfile and docker-compose

Dockerfile

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+FROM maven:3-jdk-8
+
+RUN apt-get update && apt-get install -y --no-install-recommends build-essential  && rm -rf /var/lib/apt/lists/*
+
+RUN useradd -g users user && mkdir -p /home/user && chown -R user:users /home/user
+WORKDIR /app
+
+RUN chown -R user:users /app
+USER user
+
+CMD ["/bin/bash"]

docker-compose.yml

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+cli:
+  build: .
+  command: mvn clean test
+  volumes:
+    - .:/app