Update README.md

Author: damalis

README.md

@@ -261,6 +261,18 @@ class DefaultController extends AbstractController
 ```
 
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+
+#### to display Symfony Web Debug Toolbar
+
+must add the below code in the ```./symfony/webapp/config/packages/framework.yaml``` file.
+
+```
+framework:
+    # ...
+    # trust *all* requests (the 'REMOTE_ADDR' string is replaced at
+    # run time by $_SERVER['REMOTE_ADDR'])
+    trusted_proxies: 'symfony,REMOTE_ADDR'
+```
 										
 #### Proxy