Kibana: include config file that doesn't refer to xpack

The default Kibana config file still has an option to enable X-pack, which
is now removed.

docker/elastic/Dockerfile-kibana

@@ -2,4 +2,5 @@ FROM docker.elastic.co/kibana/kibana:5.6.1
 LABEL maintainer Sybren A. Stüvel <sybren@blender.studio>
 
 RUN bin/kibana-plugin remove x-pack
+ADD kibana.yml /usr/share/kibana/config/kibana.yml
 RUN kibana 2>&1 | grep -m 1 "Optimization of .* complete"

docker/elastic/kibana.yml

@@ -0,0 +1,8 @@
+---
+
+server.name: kibana
+server.host: "0"
+elasticsearch.url: http://elasticsearch:9200
+
+# Hide dev tools
+console.enabled: false