diff --git a/README.md b/README.md
index 8c19ffb..a375926 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,8 @@ ssh -p 2222 localhost
 
 If you want log like the [C implementation](https://github.com/skeeto/endlessh), you need to set both CLI arguments `-logtostderr` and `-v=1`, then the log will go to stderr. You can set different log destinations via CLI arguments.
 
+Also check out [examples](./examples/examples.md).
+
 ## Usage
 
 Usage of `./endlessh-go`
@@ -74,7 +76,7 @@ Usage of `./endlessh-go`
 
 ## Metrics
 
-This golang implementation exports the following Prometheus metrics.
+Endlessh-go exports the following Prometheus metrics.
 
 | Metric                               | Type  | Description  |
 |--------------------------------------|-------|--------------|
@@ -99,4 +101,6 @@ The dashboard requires Grafana 8.2.
 
 You can import the dashboard from Grafana.com using ID [15156](https://grafana.com/grafana/dashboards/15156)
 
+The dashboard visualizes data for the selected time range.
+
 The IP addresses are clickable and link you to the [ARIN](https://www.arin.net/) database.
diff --git a/dashboard/endlessh.json b/dashboard/endlessh.json
index a7b7bca..26e7db1 100755
--- a/dashboard/endlessh.json
+++ b/dashboard/endlessh.json
@@ -308,7 +308,7 @@
       "type": "stat"
     },
     {
-      "datasource": null,
+      "datasource": "${DS_PROMETHEUS}",
       "fieldConfig": {
         "defaults": {
           "color": {
@@ -619,7 +619,7 @@
       "type": "stat"
     },
     {
-      "datasource": null,
+      "datasource": "${DS_PROMETHEUS}",
       "fieldConfig": {
         "defaults": {
           "color": {
@@ -679,7 +679,7 @@
           "expr": "(endlessh_client_open_count_total{instance=\"$host\",job=\"$job\"}) - (endlessh_client_closed_count_total{instance=\"$host\",job=\"$job\"} offset $__interval  or endlessh_client_open_count_total{instance=\"$host\",job=\"$job\"} * 0)",
           "instant": false,
           "interval": "",
-          "legendFormat": "Current Open Connections",
+          "legendFormat": "Open Connections",
           "refId": "current_open"
         }
       ],
@@ -1131,7 +1131,7 @@
       "type": "geomap"
     },
     {
-      "datasource": null,
+      "datasource": "${DS_PROMETHEUS}",
       "fieldConfig": {
         "defaults": {
           "color": {
@@ -1427,5 +1427,5 @@
   "timezone": "",
   "title": "Endlessh",
   "uid": "ATIxYkO7k",
-  "version": 292
+  "version": 2
 }
\ No newline at end of file
diff --git a/examples/docker-compose.yml b/examples/docker-compose.yml
index b0604bf..5ce80cb 100644
--- a/examples/docker-compose.yml
+++ b/examples/docker-compose.yml
@@ -50,12 +50,11 @@ services:
       - GF_SECURITY_ADMIN_PASSWORD=examples
     volumes:
       - grafana_var:/var/lib/grafana/
-      - grafana_etc:/etc/grafana/
+      - ./grafana-datasource.yml:/etc/grafana/provisioning/datasources/prometheus.yml
 
 networks:
   example_network:
 
 volumes:
   prometheus:
-  grafana_var:
-  grafana_etc:
\ No newline at end of file
+  grafana_var:
\ No newline at end of file
diff --git a/examples/examples.md b/examples/examples.md
index e69de29..6a98b8d 100644
--- a/examples/examples.md
+++ b/examples/examples.md
@@ -0,0 +1,24 @@
+# Examples
+
+## docker compose
+
+This is an example how to setup endlessh-go, Prometheus, and Grafana using [docker compose](https://docs.docker.com/compose/). The reference of the compose file can be find [here](https://docs.docker.com/compose/compose-file/).
+
+You also need `prometheus.yml` as a Prometheus configuration. [Here](https://prometheus.io/docs/prometheus/latest/configuration/configuration/) is more about Prometheus configuration.
+
+Although Grafana data source can be setup manually, to ease the setup, we provision a data source `grafana-datasource.yml` for Grafana.
+
+To start the stack, in the `examples` folder, run:
+
+```
+sudo docker-compose up -d
+```
+
+This example exposes the following ports.
+
+* **2222**: The SSH port. You may test endlessh-go by run `ssh -p 2222 localhost`. Your SSH client should hang. You can view the log of endlessh-go by run `sudo docker logs endlessh`.
+* **2112**: The Prometheus metrics exported by endlessh-go. You can open the your web browser and go to [http://localhost:2112/metrics](http://localhost:2112/metrics) to view the metrics.
+* **9090**: Prometheus web interface. Go to [http://localhost:9090](http://localhost:9090) in your web browser for Prometheus. You can check whether the target of endlessh-go is up (Click Status, then Targets).
+* **3000**: Grafana. Go to [http://localhost:3000](http://localhost:3000) for Grafana. Use username `examples` and password `examples` to login.
+
+In this example, we do not [provision a dashboard](https://grafana.com/tutorials/provision-dashboards-and-data-sources/) for Grafana. You need to manually load the endlessh-go dashboard, by either importing it from the Grafana.com using ID [15156](https://grafana.com/grafana/dashboards/15156), or pasting the dashboard JSON text to the text area. See the [Grafana documentation](https://grafana.com/docs/grafana/latest/dashboards/export-import/). Then select *Prometheus* as the data source.
diff --git a/examples/grafana-datasource.yml b/examples/grafana-datasource.yml
new file mode 100644
index 0000000..8a20526
--- /dev/null
+++ b/examples/grafana-datasource.yml
@@ -0,0 +1,6 @@
+apiVersion: 1
+
+datasources:
+  - name: Prometheus
+    type: prometheus
+    url: prometheus:9090
\ No newline at end of file