Update README.md

README.md

 
 # Install
 
-OpenCombat is in development mode. Considering in your virtual environment, install synergine2:
+Note: OpenCombat is in development mode. 
+
+Considering in your virtual environment, install synergine2:
 
     git clone https://github.com/buxx/synergine2.git
     cd synergine2
 
     pip install -r requirements.txt
 
+You also need a running redis server (used db number is `0`, soon configurable). 
+
 # Run
 
 Example run: