Update app.py

app.py

@@ -399,9 +399,10 @@ def download_jobs():
         mimetype='text/csv',
         headers={"Content-Disposition": "attachment;filename=jobs.csv"}
     )
-
 if __name__ == "__main__":
-    # Convert Excel serial dates before first request
+    # Create tables & migrate dates before serving
     with app.app_context():
+        db.create_all()
         convert_excel_serial_dates()
-    app.run(host="0.0.0.0", port=5000, debug=True)
+    port = int(os.environ.get("PORT", 5000))
+    app.run(host="0.0.0.0", port=port, debug=False, use_reloader=False)