Add health check edge function (#26823)

supabase/functions/health-check/index.ts

@@ -0,0 +1,21 @@
+import { serve } from "https://deno.land/std@0.168.0/http/server.ts";
+
+serve(async (req) => {
+  const data = { healthy: true };
+  const corsHeaders = {
+    "Access-Control-Allow-Origin": "*",
+    "Access-Control-Allow-Methods": "POST",
+    "Access-Control-Allow-Headers":
+      "authorization, x-request-id, apikey, content-type, user-agent, sec-ch-ua, sec-ch-ua-mobile, sec-ch-ua-platform, referer, accept",
+  };
+
+  // This is needed if you're planning to invoke your function from a browser.
+  if (req.method === "OPTIONS") {
+    return new Response("ok", { headers: corsHeaders });
+  }
+
+  return new Response(JSON.stringify(data), {
+    headers: { ...corsHeaders, "Content-Type": "application/json" },
+    status: 200,
+  });
+});