added jre8

README.md

 # openjdk
 
-This is the Git repo of openjdk custom Docker images
\ No newline at end of file
+This is the Git repo of openjdk custom Docker images.
+Check the Docker Hub (https://hub.docker.com/u/clarinpl) for prebuild images.

jre8/Dockerfile

+FROM ubuntu:16.04
+
+RUN apt-get update && \
+    apt-get -y install \
+      openjdk-8-jre
+
+RUN rm -rf /var/lib/apt/lists/*
+
+ENV JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64
+ENV PATH $JAVA_HOME/bin:$PATH