Screen streaming under docker environment (#674)

Co-authored-by: Shuchang Zheng <wintonzheng0325@gmail.com>

run_streaming.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+echo "Starting streaming..."
+
+while true; do
+    xwd -root | xwdtopnm | pnmtopng > /tmp/skyvern_screenshot.png
+    sleep 1
+done