Update README.md

Author: ElusiveSpirit

README.md

@@ -1,2 +1,16 @@
 # FBD Backend
-Feature Branch Deployment backend for testing merge request
+Feature Branch Deployment backend for merge requests' testings.
+> Not complete production app, just to show an example
+
+## Description
+
+Using nginx-proxy to create an auto-refreshing routing system for multiple docker-compose apps in a single network to allow users to access apps via different domains created from branch slug.
+
+Example:  
+Developer opens Merge Request with a feature. Team-lead or analyst needs to review it. CI/CD system deploys this app version along with others. So the reviewer could access it via subdomain style link like `http://feature-branch.awesome-app.com`
+
+## Use-cases
+
+* Store and Show deployed branches
+* Stop and clean up a branch
+* Open public access for a branch by switching access port