Added @Xe's tips on the Dockerfile

https://github.com/Shuo-IRC/Shuo/pull/87

Dockerfile

@@ -1,3 +1,25 @@
-FROM node:0.12-onbuild
+#
+# Thanks to @Xe for the Dockerfile template
+# https://github.com/Shuo-IRC/Shuo/pull/87/files
+#
+
+FROM node:4.0-onbuild
+
+# Create a non-root user for shout to run in.
+RUN useradd --create-home shout
+
+# Needed for setup of Node.js
+ENV HOME /home/shout
+
+# Customize this to specify where Shout puts its data.
+# To link a data container, have it expose /home/shout/data
+ENV SHOUT_HOME /home/shout/data
+
+# Expose HTTP
 EXPOSE 9000
-ENTRYPOINT ["node", "index.js"]
+
+# Drop root.
+USER shout
+
+# Don't use an entrypoint here. It makes debugging difficult.
+CMD node index.js --home $SHOUT_HOME

docker-compose.yml

@@ -0,0 +1,4 @@
+shout:
+  build: .
+  ports:
+    - "9000:9000"