Update README.md

Adding description of how-to install the requirements and run the code

README.md

@@ -7,3 +7,11 @@ DO NOT USE THIS AS A REAL CURRENCY TO SEND, RETRIEVE, OR STORE ACTUAL MONEY! Whi
 Click the link below for the full documentation.
 
 http://labchain.readthedocs.io/en/latest/
+
+**Running the code**
+You need python3 to be able to run the code. To install the requirements, that are listed in the "requirements.txt", file you should run the command "pip install -r requirements.txt".
+
+If you are in a Debian variant OS you can run the following commands (from inside the labchain code folder) to have everything set-up:
+sudo apt-get install python3
+sudo apt-get install python3-pip
+sudo python3 -m pip install -r requirements.txt