Upload app.py

app.py

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+import os
+import streamlit as st
+import streamlit.components.v1 as components
+
+st.set_page_config(layout="wide")
+
+backend_url = os.getenv("backend", "https://bcmi.sjtu.edu.cn/index.html")  # 如果环境变量不存在，则使用默认 URL
+
+iframe_html = f'<iframe src="{backend_url}" width="100%" height="800"></iframe>'
+
+components.html(iframe_html, height=800)