Add GET /api/health for status.profullstack.com

apps/web/app/api/health/route.ts

@@ -0,0 +1,25 @@
+import { NextResponse } from "next/server";
+import { sqlClient } from "@/lib/db";
+
+export const runtime = "nodejs";
+export const dynamic = "force-dynamic";
+
+const NO_STORE = { "Cache-Control": "no-store" };
+
+/** Liveness for status.profullstack.com: the app answers and the DB answers within 3s. */
+export async function GET() {
+  let timer: ReturnType<typeof setTimeout> | undefined;
+  try {
+    await Promise.race([
+      sqlClient.execute("select 1"),
+      new Promise((_, reject) => {
+        timer = setTimeout(() => reject(new Error("timeout")), 3000);
+      }),
+    ]);
+    return NextResponse.json({ status: "ok", db: "ok" }, { headers: NO_STORE });
+  } catch {
+    return NextResponse.json({ status: "error", db: "down" }, { status: 503, headers: NO_STORE });
+  } finally {
+    clearTimeout(timer);
+  }
+}