provide usage example

README.md

@@ -10,7 +10,52 @@ npm install --save runtime-node-refresh
 
 # Usage
 
-It may be very usefult when you want to refresh/update your environment variables let's say your log level without restarting node server.
+Following you will find 
+
+Create `index.js` file and add the following code:
+
+```javascript
+import RnR from 'runtime-node-refresh';
+
+process.env.LOG_LEVEL = 'error';
+
+RnR(() => {
+  process.env.LOG_LEVEL = 'debug';
+});
+
+setInterval(() => console.log(`The LOG_LEVEL is set to ${process.env.LOG_LEVEL}`), 5000);
+```
+
+Create `package.json' file and fill it with the following:
+```json
+  {
+    "name": "test-rnr",
+    "scripts": {
+      "start": "node index.js",
+      "refresh": "runtime-node-refresh"
+    },
+    "dependencies": {
+      "runtime-node-refresh": "^1.0.3"
+    }
+  }
+```
+
+Open two terminals, in the first terminal execute:
+
+```sh
+npm start
+```
+
+
+And run the refresh task in second terminal:
+
+```sh
+npm run refresh
+```
+
+## Real life example:
+
+It may be very usefult when you want to restart/update environment variable on running node application without restarting the node server.
 
 Note: RnR is using node signals which means it does not work on Worker threads.
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "runtime-node-refresh",
-  "version": "1.0.3",
+  "version": "1.0.4",
   "bin": "./bin/rnr.js",
   "description": "Refresh node environment variables on runtime without restarting the node server.",
   "main": "index.js",