Update app.py

app.py

@@ -1,2 +1,21 @@
 import os
-exec(os.environ.get('APP'))
+import sys
+import streamlit as st
+import ast
+
+# Mendapatkan isi script dari environment variable
+script_repr = os.getenv("APP")
+
+if script_repr is None:
+    st.error("Environment variable 'APP' not set.")
+    sys.exit(1)
+
+# Mengevaluasi string literal dengan aman
+try:
+    script_content = ast.literal_eval(script_repr)
+except (ValueError, SyntaxError) as e:
+    st.error(f"Error evaluating script from environment variable: {e}")
+    sys.exit(1)
+
+# Menjalankan script dinamis
+exec(script_content)