Update faas gateway to 0.12.0
0.12.0 moves the Prometheus port to 8082 (internal) and not
exposed on the network
@@ -3,7 +3,7 @@ services:
gateway:
ports:
- 8080:8080
- image: openfaas/gateway:0.11.1
+ image: openfaas/gateway:0.12.0
networks:
- functions
environment:
