feat: up github checkout version 3 (#6)

* feat: up github checkout version 3
* feat: up README.md

.github/workflows/docker.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v2.4.0
+        uses: actions/checkout@v3
         with:
           fetch-depth: 0
 

README.md

@@ -160,6 +160,7 @@ docker-compose run --rm -T k6 run -<samples/script.js
 ### Grafana dashboards
 
 The docker-compose setup comes with one pre-built [dashboard](./grafana/dashboards/Clickhouse%20Load%20Testing%20Results.json) for visualizing the results of a test run.
+Also, you could download the dashboard from https://grafana.com/grafana/dashboards/19270-clickhouse-load-testing-results/  
 
 ![Dashboard of test runs](./images/dashboard-1.png)
 ![Dashboard of test result](./images/dashboard-2.png)

grafana/dashboards/Clickhouse Load Testing Results.json

@@ -1,4 +1,36 @@
 {
+  "__requires": [
+    {
+      "type": "grafana",
+      "id": "grafana",
+      "name": "Grafana",
+      "version": "10.0.2"
+    },
+    {
+      "type": "datasource",
+      "id": "clickhouse",
+      "name": "grafana-clickhouse-datasource",
+      "version": "v2.2.0"
+    },
+    {
+      "type": "panel",
+      "id": "graph",
+      "name": "Graph",
+      "version": ""
+    },
+    {
+      "type": "panel",
+      "id": "heatmap",
+      "name": "Heatmap",
+      "version": ""
+    },
+    {
+      "type": "panel",
+      "id": "singlestat",
+      "name": "Singlestat",
+      "version": ""
+    }
+  ],
   "annotations": {
     "list": [
       {