Align backend plan with codebase

app/api/auth/logout/route.ts

@@ -0,0 +1,13 @@
+import { NextResponse } from "next/server";
+import { isDatabaseConfigured } from "../../../../lib/server/env";
+import { dbUnavailable } from "../../../../lib/server/responses";
+import { destroySessionFromRequest } from "../../../../lib/server/session";
+
+export async function POST() {
+  if (!isDatabaseConfigured()) {
+    return dbUnavailable();
+  }
+
+  await destroySessionFromRequest();
+  return NextResponse.json({ ok: true });
+}