infobox/node: render statistic charts based on prometheus backend

history:

Frontend generated node charts with graphite backend
Resolution for bower conflict
Let the user configure the metrics in config.json
Fix grunt task for deploying c3 css
Fix tooltip layout issue

config.json.example

@@ -1,6 +1,10 @@
 {
-  "dataPath": "https://map.luebeck.freifunk.net/data/",
-  "siteName": "Freifunk Lübeck",
+  "dataPath": [
+    "http://map.ffgl.eu/data/",
+    "http://karte.ffdus.de/data/",
+    "http://karte.freifunk-iserlohn.de/data/"
+  ],
+  "siteName": "Freifunk Fluss",
   "mapSigmaScale": 0.5,
   "showContact": true,
   "maxAge": 14,
@@ -19,9 +23,40 @@
     }
   ],
   "siteNames": [
-    { "site": "ffhl", "name": "Lübeck" },
-    { "site": "ffeh", "name": "Entenhausen" },
-    { "site": "ffgt", "name": "Gothamcity" },
-    { "site": "ffal", "name": "Atlantis" }
+    { "site": "ffgl-bcd", "name": "Burscheid" },
+    { "site": "ffgl-bgl", "name": "Bergisch Gladbach" },
+    { "site": "ffgl-lln", "name": "Leichlingen" },
+    { "site": "ffgl-ode", "name": "Odenthal" },
+    { "site": "ffgl-ovr", "name": "Overath" },
+    { "site": "ffgl-rrh", "name": "Rösrath" },
+    { "site": "ffdus", "name": "Flingern" }
+    { "site": "ffis", "name": "Iserlohn" }
+  ],
+  "nodeCharts": [
+    {
+      "name": "Statistik",
+      "metrics": [
+        {
+          "id": "clients",
+          "color": "#1566A9",
+          "label": "Clients",
+          "query": "sum(statistics_clients_total{nodeid=%22{{NODE_ID}}%22})"
+        },
+        {
+          "id": "load",
+          "color": "1566A9",
+          "label": "Systemlast",
+          "query": "sum(statistics_loadavg{nodeid=%22{{NODE_ID}}%22})"
+        },
+        {
+          "id": "rx",
+          "color": "#1566A9",
+          "label": "Traffic (RX, kbps)",
+          "query": "sum(rate(statistics_traffic_rx_bytes{nodeid=%22{{NODE_ID}}%22}[30m])/125)"
+        }
+      ],
+      "defaultMetric": "clients",
+      "url": "https://prometheus.map.eulenfunk.de/api/v1/query_range"
+    }
   ]
 }