Add generated public and private keys to .gitignore

Author: fbourigault

league/oauth2-server-bundle/0.4/manifest.json

@@ -10,5 +10,8 @@
         "OAUTH_PUBLIC_KEY": "%kernel.project_dir%/%CONFIG_DIR%/jwt/public.pem",
         "OAUTH_PASSPHRASE": "%generate(secret)%",
         "OAUTH_ENCRYPTION_KEY": "%generate(secret)%"
-    }
+    },
+    "gitignore": [
+        "/%CONFIG_DIR%/jwt/*.pem"
+    ]
 }