Update app.py

app.py

@@ -2,6 +2,15 @@ import streamlit as st
 import seaborn as sns
 import matplotlib.pyplot as plt
 import pandas as pd
+import os
+import matplotlib
+matplotlib.use("Agg")  # headless safe backend
+os.environ["STREAMLIT_SERVER_HEADLESS"] = "true"
+os.environ["STREAMLIT_SERVER_PORT"] = "8501"
+
+matplotlib.use("Agg")  # headless safe backend
+os.environ["STREAMLIT_SERVER_HEADLESS"] = "true"
+os.environ["STREAMLIT_SERVER_PORT"] = "8501"
 
 # Load data
 @st.cache_data