Added SLAO.io to Partners section

Author: sochix

README.md

@@ -15,6 +15,10 @@
 
 # [Tests][url-tests]
 
+# Partners
+
+### [📊SLAO: Node.js + Express monitoring](http://bit.ly/2DzyOTx)
+Spot the key metrics of your REST API at one glance with a single simple dashboard, set up alerts in 2 clicks and get notified of every problem immediately
 
 # License