Update start.sh

start.sh

@@ -5,7 +5,7 @@ nginx &
 
 echo "Starting the main application: python server.py"
 
-sed -i '/port = find_free_port()/c\   port = 39775' /app/server/server.py
+sed -i 's/^\(\s*\)port = find_free_port()/\1port = 39775/' /app/server/server.py
 
 # Execute the Python server command
 exec python /app/server/server.py