fix: add main function to app.py for openenv multi-mode deployment validator

server/app.py

@@ -456,3 +456,10 @@ function nextEpisode() {
 </body>
 </html>
 """
+
+def main():
+    import uvicorn
+    uvicorn.run(app, host="0.0.0.0", port=7860)
+
+if __name__ == "__main__":
+    main()