derby: Added heroku deployment

labs/architecture-examples/derby/Makefile

 compile:
-	./node_modules/coffee-script/bin/coffee -bw -o ./lib -c ./src
-
-run:
 	npm install
 	./node_modules/coffee-script/bin/coffee -b -o ./lib -c ./src
+
+run: compile
 	node server.js
+
+deploy-setup: compile
+	git init
+	heroku git:remote -a todomvc-derby
+	sed -i 's/lib//' .gitignore
+	git add -A
+	git commit -m "Deployment update"
+
+deploy:
+	git push heroku master

labs/architecture-examples/derby/Procfile

+web: node server.js

labs/architecture-examples/derby/README.md

@@ -23,3 +23,9 @@ the demo server for you.
 In one window, run `make` which will continue to compile the CoffeScript as
 you save changes. In a separate window run `node server.js` and open up the
 shown URL.
+
+
+### Deploy on Heroku
+
+Run `make deploy-setup` once to setup a git repository in this subdirectory and
+setup Heroku. Running `make heroku` will put it on Heroku.

labs/architecture-examples/derby/server.js

-require('derby').run(__dirname + '/lib/server', 3003);
+var port = process.env.PORT || 3003;
+
+require('derby').run(__dirname + '/lib/server', port);