fix path

c3post/main.py

@@ -210,4 +210,6 @@ def store_item(
     )
     db.add(item)
     db.commit()
-    return RedirectResponse(url="/", status_code=HTTP_303_SEE_OTHER)
+    return RedirectResponse(
+        url=app.url_path_for("main"), status_code=HTTP_303_SEE_OTHER
+    )