Add docker-compose with prometheus and grafana (#495)

* Add docker-compose with prometheus and grafana

* Add dashbord installation

* Fix path to config file

tests/prometheus/grafana/conf/default-provider.yaml

@@ -0,0 +1,23 @@
+apiVersion: 1
+providers:
+  # <string> an unique provider name
+- name: 'default-provider'
+  # <int> org id. will default to orgId 1 if not specified
+  orgId: 1
+  # <string, required> name of the dashboard folder. Required
+  folder: dashboards
+  # <string> folder UID. will be automatically generated if not specified
+  folderUid: ''
+  # <string, required> provider type. Required
+  type: file
+  # <bool> disable dashboard deletion
+  disableDeletion: false
+  # <bool> enable dashboard editing
+  editable: true
+  # <int> how often Grafana will scan for changed dashboards
+  updateIntervalSeconds: 10
+  options:
+    # <string, required> path to dashboard files on disk. Required
+    path: /opt/bitnami/grafana/dashboards
+    # <bool> enable folders creation for dashboards
+    #foldersFromFilesStructure: true

tests/prometheus/grafana/conf/prometheus.yml

@@ -0,0 +1,6 @@
+apiVersion: 1
+datasources:
+  - name: Prometheus
+    type: prometheus
+    url: http://onlyoffice-prometheus:9090
+    editable: true