Update app.py

app.py

@@ -15,6 +15,7 @@ st.markdown("""
             font-family: 'Arial', sans-serif;
         }
         .stApp {
+            background-image: url('https://i.pinimg.com/736x/9c/7b/33/9c7b33bca7b7dfd8c22daa0fd3d12b05.jpg');
             background-color: black;
             padding: 20px;
             border-radius: 10px;