Add DigitalOcean sponsorship info (#29)

README.md

@@ -4,6 +4,14 @@
 [![Go Report Card](https://goreportcard.com/badge/github.com/jthomperoo/predictive-horizontal-pod-autoscaler)](https://goreportcard.com/report/github.com/jthomperoo/predictive-horizontal-pod-autoscaler)
 [![Documentation Status](https://readthedocs.org/projects/predictive-horizontal-pod-autoscaler/badge/?version=latest)](https://predictive-horizontal-pod-autoscaler.readthedocs.io/en/latest)
 [![License](http://img.shields.io/:license-apache-blue.svg)](http://www.apache.org/licenses/LICENSE-2.0.html)
+
+<p>This project is 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>
+
 # Predictive Horizontal Pod Autoscaler
 This is a [Custom Pod Autoscaler](https://www.github.com/jthomperoo/custom-pod-autoscaler); aiming 
 to have identical functionality to the Horizontal Pod Autoscaler, however with added predictive