Update app.py

app.py

@@ -19,7 +19,7 @@ def set_bg_from_local_image(local_img_path):
     page_bg_img = f"""
     <style>
     .stApp {{
-        background-image: url("data:image/jpg;base64,{bin_str}");
+        background-image: url("data:image/png;base64,{bin_str}");
         background-size: cover;
         background-attachment: fixed;
         background-repeat: no-repeat;