Update documentation in README.md file

README.md

@@ -1,2 +1,58 @@
 # cron-runner
 Custom code execution periodically
+
+[![NPM](https://nodei.co/npm/cron-runner.png)](https://nodei.co/npm/cron-runner/)
+
+[![Coveralls branch](https://img.shields.io/coveralls/bem-site/cron-runner/master.svg)](https://coveralls.io/r/bem-site/cron-runner?branch=master)
+[![Travis](https://img.shields.io/travis/bem-site/cron-runner.svg)](https://travis-ci.org/bem-site/cron-runner)
+[![David](https://img.shields.io/david/bem-site/cron-runner.svg)](https://david-dm.org/bem-site/cron-runner)
+[![David](https://img.shields.io/david/dev/bem-site/cron-runner.svg)](https://david-dm.org/bem-site/cron-runner#info=devDependencies)
+
+
+## Usage
+
+You should inherit from given module with help of [inherit](https://www.npmjs.com/package/inherit)
+
+```
+var inherit = require('inherit'),
+    CronRunner = require('cron-runner');
+
+var MyCronRunner = inherit(CronRunner, {
+    __constructor: function (options) {
+        this.__base(options);
+        //TODO implement your custom initialization code here
+    },
+
+    execute: function () {
+        //TODO implement your custom execution code here
+    }
+});
+
+var mcr = new MyCronRunner({
+    cron: {
+        pattern: '0 */1 * * * *'
+    }
+});
+
+mcr.start();
+```
+
+## Testing
+
+Run tests:
+```
+npm run mocha
+```
+
+Run tests with istanbul coverage calculation:
+```
+npm run istanbul
+```
+
+Run codestyle verification (jshint and jscs)
+```
+npm run codestyle
+```
+
+Maintainer @tormozz48
+Please send your questions and proposals to: tormozz48@gmail.com