Add example for deploying notebook container using Docker Compose.

(c) Copyright IBM Corp. 2016

examples/docker-compose/notebook/env.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+# Copyright (c) Jupyter Development Team.
+# Distributed under the terms of the Modified BSD License.
+
+# Set default values for environment variables required by notebook compose
+# configuration file.
+
+# Container name
+: "${NAME:=my-notebook}"
+export NAME
+
+# Exposed container port
+: ${PORT:=80}
+export PORT
+
+# Container work volume name
+: "${WORK_VOLUME:=$NAME-work}"
+export WORK_VOLUME
+
+# Container secrets volume name
+: "${SECRETS_VOLUME:=$NAME-secrets}"
+export SECRETS_VOLUME