Update app.py

app.py

@@ -5,6 +5,10 @@ import os
 import traceback
 import base64
 
+# Install Graphviz if not found
+if os.system("which dot") != 0:
+    os.system("apt-get update && apt-get install -y graphviz")
+
 st.title("Multi-Agent Essay Writing Assistant")
 
 #st.set_page_config(page_title="Multi-Agent Essay Writing Assistant", page_icon="🤖🤖🤖✍️", layout = "centered")