Digital ocean badge (#266)

* add : digital ocean logo added to readme.

* log : changes logged.

* edit : referral link removed.

* edit : `README.md` edited.

* log : changes logged.

CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - `one_line_request.yml` template
 - `feature_request.yml` template
 - `config.yml` for issue template
+- [DigitalOcean](https://digitalocean.com/) logo added to `README.md`
 ### Changed
 - Bug report template modified
 - Test system modified

README.md

@@ -38,6 +38,7 @@
    * [Authors](https://github.com/sepandhaghighi/art/blob/master/AUTHORS.md)
    * [License](https://github.com/sepandhaghighi/art/blob/master/LICENSE)
    * [Show Your Support](https://github.com/sepandhaghighi/art#show-your-support)
+   * [Acknowledgments](https://github.com/sepandhaghighi/art#acknowledgments)
    * [Changelog](https://github.com/sepandhaghighi/art/blob/master/CHANGELOG.md)
    * [Code of Conduct](https://github.com/sepandhaghighi/art/blob/master/.github/CODE_OF_CONDUCT.md)
 
@@ -880,3 +881,10 @@ If you do like our project and we hope that you do, can you please support us? O
 - Your company's logo can be featured on **Readme** and **Website**
 - Intended for medium-sized companies
 
+## Acknowledgments
+Some parts of the infrastructure for this project are supported by:</p>
+<p>
+  <a href="https://www.digitalocean.com/">
+    <img src="https://opensource.nyc3.cdn.digitaloceanspaces.com/attribution/assets/SVG/DO_Logo_horizontal_blue.svg" width="201px">
+  </a>
+</p>