license in ReadMe

README.md

@@ -17,3 +17,9 @@
 <p  align="center">3. Create a new user, called php bx this line of code on your local server:<br>
 <code  align="center">grant all privileges on chess.* to 'php'@'localhost'  identified by 'php2000';<br>
 flush privileges;</code><br>Or you can use the file user.sql</p> 
+<br><br>
+<h4 align="center">Attribution Requirements</h4>
+<p align="center">As an open source project, attribution is critical from a legal, practical and motivational perspective. Please give us credits! Common places for attribution are for example: to mention us in your project README, the 'About' section or the footer on a website/in mobile apps. </p>
+<br><br>
+<h4 align="center">License</h4>
+<p align="center">This work is licensed under the GNU General Public License v3.0 license. View LICENSE.txt for details.</p>