🐛 Fix typo

server/index.js

@@ -7,7 +7,7 @@ import {
 } from "./api/index.js";
 
 const app = express();
-const port = process.send.PORT || 3000;
+const port = process.env.PORT || 3000;
 
 app.get("/api/timetable", getTimetable);
 app.get("/api/substitutions", getSubstitutions);