change default port for loki (#46)

* changes default port for loki

80 is a privileged port on linux which requires root access.
Which makes it harder to get started locally.

closes #40

* use grafana/grafana:master since it contains more fixes

README.md

@@ -36,7 +36,7 @@ Grafana is Loki's UI, so you'll also want to run one of those:
 $ docker run -ti -p 3000:3000 -e "GF_EXPLORE_ENABLED=true" grafana/grafana:master
 ```
 
-In the Grafana UI (http://localhost:3000), log in with "admin"/"admin", add a new "Grafana Logging" datasource for `http://host.docker.internal:80`, then go to explore and enjoy!
+In the Grafana UI (http://localhost:3000), log in with "admin"/"admin", add a new "Grafana Logging" datasource for `http://host.docker.internal:3100`, then go to explore and enjoy!
 
 ## Usage Instructions
 

docs/loki-local-config.yaml

 auth_enabled: false
 
+server:
+  http_listen_port: 3100
+
 ingester:
   lifecycler:
     interface_names:

docs/promtail-local-config.yaml

@@ -6,7 +6,7 @@ positions:
   filename: /tmp/positions.yaml
 
 client:
-  url: http://localhost/api/prom/push
+  url: http://localhost:3100/api/prom/push
 
 scrape_configs:
 - job_name: system