added demo link and railway deploy on README

README.md

@@ -1,6 +1,11 @@
 # Link Shortener
 
 Link Shortener is a site to manage your short urls while providing analytics to the url traffics.
+<a src="https://shortener.tzgyn.com">Demo Here</a>
+
+### One Click Deploy on Railway
+
+[![Deploy on Railway](https://railway.app/button.svg)](https://railway.app/template/VKReDm?referralCode=bSruGU)
 
 ## Development