Add README.md

README.md

+# Uno Game
+A socket based uno game writing in java.
+
+# Setup
+Install java
+```
+sudo apt install default-jdk
+```
+
+# How to play
+Start a server by
+```
+java startGame
+```
+and follow the prompt
+
+Then start as many client as you want as players in Client folder
+
+```
+java Client
+```
+Follow the prompt to enter the port number of the server to join the same room as other players. Then enjoy playing uno!
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