Update app.py

app.py

@@ -42,7 +42,7 @@ def main():
     page_bg_img = '''
         <style>
         body {
-            background-image: url("Screenshot 2023-06-06 125216.png");
+            background-image: url("https://www.paho.org/sites/default/files/mosquitos_copia.jpg");
             background-size: cover;
             opacity: 0.80;
         }