grafana: Use config file instead of env vars

monitoring/docker-compose.yml

@@ -18,9 +18,6 @@ services:
     restart: "on-failure"
     volumes:
     - "/storage/wubloader-metrics/grafana:/var/lib/grafana"
+    - "./grafana:/etc/grafana"
     ports:
     - "1338:3000"
-    environment:
-      GF_AUTH_ANONYMOUS_ENABLED: "true"
-      GF_AUTH_ANONYMOUS_ORG_NAME: "Main Org."
-      GF_AUTH_ANONYMOUS_ORG_ROLE: "Viewer"

monitoring/grafana/grafana.ini

@@ -0,0 +1,4 @@
+[auth.anonymous]
+enabled = true
+org_name = Main Org.
+org_role = Viewer