Inserted usage of Dockerfile

example/README.md

@@ -0,0 +1,23 @@
+Dockerfile
+=========
+The Dockerfile was created to embed `envetcd` in each docker container and run it directly in order to wrap the Go executable for the services. 
+
+Installation
+------------
+The contents of the Dockerfile in this directory should be prepended into the Dockerfiles of each service. Building the service docker image will add the `envetcd` binary into /envetcd directory. A RUN command will be used to automatically execute `envetcd` to get the Services' environment variables. However another script or program is needed to write the env variables into the container. 
+
+
+```shell
+
+#modify base image for each service
+FROM ubuntu:14.04 
+
+# Add envetcd into Docker Image at /envetcd/
+ADD envetcd /envetcd/
+WORKDIR /envetcd
+
+RUN ./envtcd --system $SYSTEM --service $SERVICE -c env > $TMPFILE_ENVETCD
+RUN {script that will write the environment variables from the TMPFILE_ENVETCD}
+RUN rm -f $TMPFILE_ENVETCD
+
+```