Update README.md

BattlefieldDuck · web-flow · commit a0641a4f8f8b · 2019-06-18T06:20:21.000+08:00
diff --git a/README.md b/README.md
@@ -1,2 +1,6 @@
 # Module-SecurityLaser
 Security Laser is not expensive in TF2Sandbox
+
+Command: `sm_laser`
+
+![Screenshot](https://github.com/tf2-sandbox-studio/Module-SecurityLaser/raw/master/screenshot.png)
