utilization reduction

src/routes/api/health.ts

@@ -0,0 +1,23 @@
+import type { APIEvent } from "@solidjs/start/server";
+
+/**
+ * Lightweight uptime/monitoring probe.
+ *
+ * Returns a tiny 200 that the edge CDN caches (`CDN-Cache-Control`), so
+ * health checks (Sentry uptime monitors, external monitors, `curl`) cost a
+ * fraction of a rendered page instead of a full SSR response. Point monitors
+ * at `https://freno.me/api/health`.
+ */
+export async function GET(_event: APIEvent) {
+ return new Response(JSON.stringify({ status: "ok" }), {
+  status: 200,
+  headers: {
+   "Content-Type": "application/json; charset=utf-8",
+   // Browser: always revalidate (tiny body, no reason to cache).
+   "Cache-Control": "public, max-age=0",
+   // Edge CDN: serve from cache for 1 min, then stale-while-revalidate
+   // for a day so repeated probe hits never touch the origin.
+   "CDN-Cache-Control": "public, s-maxage=60, stale-while-revalidate=86400"
+  }
+ });
+}