Add public GET /api/health

app/api/health/route.ts

@@ -0,0 +1,27 @@
+import { NextResponse } from "next/server";
+import { db } from "@/lib/db";
+
+export const runtime = "nodejs";
+export const dynamic = "force-dynamic";
+
+const DB_TIMEOUT_MS = 3000;
+const headers = { "Cache-Control": "no-store" };
+
+// Public health check for status.profullstack.com: one `select 1` with a 3s
+// ceiling. No auth and no error details in the response.
+export async function GET() {
+  let timer: ReturnType<typeof setTimeout> | undefined;
+  try {
+    await Promise.race([
+      db().execute("select 1"),
+      new Promise((_, reject) => {
+        timer = setTimeout(() => reject(new Error("timeout")), DB_TIMEOUT_MS);
+      }),
+    ]);
+    return NextResponse.json({ status: "ok", db: "ok" }, { headers });
+  } catch {
+    return NextResponse.json({ status: "error", db: "down" }, { status: 503, headers });
+  } finally {
+    clearTimeout(timer);
+  }
+}