add : Usage section added.

Author: sadrasabouri

README.md

@@ -1,7 +1,41 @@
 # mafia
 :dollar: Web Server Application For Mafia Game Playing On Local Network
 
-## Roles
+## Usage
+After cloning into mafia using command bellow:
+```
+$git clone https://github.com/sadrasabouri/mafia
+```
+You should do these tiny steps:
+1. Instaling requiremets:
+First check if you have `pip3` installed in your system:
+```
+$pip3 --version
+pip 20.0.2 from /usr/lib/python3/dist-packages/pip (python 3.8)
+```
+if you already have installed `pip3` youu should see something like above, otherwise run the command bellow to install it:
+```
+$sudo apt install python3-pip
+```
+Otherwise/Then install <b>mafia</b> requirements by
+```
+$pip3 install -r requirements.txt
+```
+Now everything is ready, lets play:
+run the command `$python3 mafia.py number_of_players[int]`, for example imagine you want to play mafia with 5 players.
+```
+$python3 mafia.py 5
+```
+There you go, now each player can open a browser and type `serverhost:port_name`.
+
+In defualt mode your desired address should be `server_ip:5000`.
+
+Each player should see a page like this in his/her browser:
+<img src="https://raw.githubusercontent.com/sadrasabouri/mafia/master/doc/Pictures/mobile_browser.png">
+And the GOD can track player's role by checking CLI:
+<img src="https://raw.githubusercontent.com/sadrasabouri/mafia/master/doc/Pictures/CLI.png">
+
+### Roles
 | Role            | image(s)                                                                                                                                |
 | :-------------: |:----------------------------------------------------------------------------------------------------------------------------:           |
 |      Don        | <img width="100" height="100" src="https://raw.githubusercontent.com/sadrasabouri/mafia/master/static/images/roles/Don_1.png">          |
@@ -12,5 +46,5 @@
 |   Anti-attack   | <img width="100" height="100" src="https://raw.githubusercontent.com/sadrasabouri/mafia/master/static/images/roles/Anti-attack_1.png">  |
 |     Resident    | <img width="100" height="100" src="https://raw.githubusercontent.com/sadrasabouri/mafia/master/static/images/roles/Resident_1.png"><img width="100" height="100" src="https://raw.githubusercontent.com/sadrasabouri/mafia/master/static/images/roles/Resident_2.png"><img width="100" height="100" src="https://raw.githubusercontent.com/sadrasabouri/mafia/master/static/images/roles/Resident_3.png"><img width="100" height="100" src="https://raw.githubusercontent.com/sadrasabouri/mafia/master/static/images/roles/Resident_4.png">                                                                                                                 |
 
-### References
+## References
 Icons made by <a href="https://www.flaticon.com/authors/vectors-market" title="Vectors Market">Vectors Market</a> from <a href="https://www.flaticon.com/" title="Flaticon"> www.flaticon.com</a>