L2SS-379: Add dashboard to monitor state of Docker containers.

docker-compose/grafana/dashboards/docker.json

+{
+  "annotations": {
+    "list": [
+      {
+        "builtIn": 1,
+        "datasource": "-- Grafana --",
+        "enable": true,
+        "hide": true,
+        "iconColor": "rgba(0, 211, 255, 1)",
+        "name": "Annotations & Alerts",
+        "target": {
+          "limit": 100,
+          "matchAny": false,
+          "tags": [],
+          "type": "dashboard"
+        },
+        "type": "dashboard"
+      }
+    ]
+  },
+  "description": "",
+  "editable": true,
+  "gnetId": null,
+  "graphTooltip": 0,
+  "id": 2,
+  "links": [],
+  "panels": [
+    {
+      "datasource": "Prometheus",
+      "description": "Which Docker containers are running on the station.",
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "thresholds"
+          },
+          "custom": {
+            "fillOpacity": 90,
+            "lineWidth": 0
+          },
+          "mappings": [],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "red",
+                "value": null
+              },
+              {
+                "color": "green",
+                "value": 1
+              }
+            ]
+          }
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 14,
+        "w": 19,
+        "x": 0,
+        "y": 0
+      },
+      "id": 2,
+      "options": {
+        "alignValue": "center",
+        "legend": {
+          "displayMode": "hidden",
+          "placement": "bottom"
+        },
+        "mergeValues": true,
+        "rowHeight": 0.9,
+        "showValue": "never",
+        "tooltip": {
+          "mode": "single"
+        }
+      },
+      "pluginVersion": "8.1.2",
+      "targets": [
+        {
+          "exemplar": true,
+          "expr": "device_attribute{device=\"lts/docker/1\",name=~\".*_R\",name!=\"version_R\"}",
+          "instant": false,
+          "interval": "",
+          "legendFormat": "{{name}}",
+          "refId": "A"
+        }
+      ],
+      "title": "Docker Containers",
+      "transformations": [],
+      "type": "state-timeline"
+    }
+  ],
+  "schemaVersion": 30,
+  "style": "dark",
+  "tags": [],
+  "templating": {
+    "list": []
+  },
+  "time": {
+    "from": "now-30m",
+    "to": "now"
+  },
+  "timepicker": {},
+  "timezone": "",
+  "title": "Docker",
+  "uid": "buKx9ZHnk",
+  "version": 1
+}