Docker: Use a wrapper graph for ParkingProvider

Needed to pass the hostname data

If could pass IIPs on commandline, would not be needed:
noflo/noflo-nodejs#17

.env-default

@@ -1,4 +1,5 @@
 PORT=5000
+HOSTNAME=http://localhost:5000
 BIGIOT_PROVIDER_ID=id
 BIGIOT_PROVIDER_SECRET=secret
 REDIS_URL=redis://localhost:6379

Dockerfile

@@ -15,4 +15,4 @@ USER flowuser
 # Note: EXPOSE is not supported by Heroku, application must respect $PORT
 EXPOSE 5000
 
-CMD ["node", "./node_modules/.bin/noflo-nodejs", "--register", "false", "--graph", "graphs/ParkingProvider.json"]
+CMD ["node", "./node_modules/.bin/noflo-nodejs", "--register", "false", "--graph", "graphs/RunParkingProvider.fbp"]

graphs/RunParkingProvider.fbp

@@ -0,0 +1,3 @@
+'server running' -> STRING ServerReady(strings/SendString) -> out(core/Output)
+Provider(ParkingProvider) APP -> IN ServerReady
+'HOSTNAME' -> KEY ReadHostname(core/ReadEnv) -> HOSTNAME Provider