Updated to run as a non root user.

Part of convergencelabs/convergence-project#252

src/main/docker/Dockerfile

@@ -1,9 +1,20 @@
 FROM openjdk:11.0.11-9-jdk
 
-ADD stage /opt/convergence/
+LABEL maintainer="Convergence Labs, Inc."
+
+## Create convergence group and user to run as a non root user.
+RUN groupadd -g 5000 convergence && \
+    useradd -u 5000 -g convergence convergence
+
+COPY stage /opt/convergence/
+
+RUN chown -RL convergence:convergence /opt/convergence/
 
 EXPOSE 25520
 
 WORKDIR /opt/convergence/
 
+## Execute as the convergence user.
+USER convergence
+
 ENTRYPOINT ["/opt/convergence/bin/convergence-cluster-seed"]