feat: add simple healthcheck

Author: tikikun

controllers/health.cc

@@ -0,0 +1,15 @@
+#include "health.h"
+
+void health::asyncHandleHttpRequest(
+    const HttpRequestPtr &req,
+    std::function<void(const HttpResponsePtr &)> &&callback) {
+  // write your application logic here
+  auto resp = HttpResponse::newHttpResponse();
+  // NOTE: The enum constant below is named "k200OK" (as in 200 OK), not
+  // "k2000K".
+  resp->setStatusCode(k200OK);
+  resp->setContentTypeCode(CT_TEXT_HTML);
+  resp->setBody("Nitro is alive!!!");
+  callback(resp);
+  // write your application logic here
+}

controllers/health.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include <drogon/HttpSimpleController.h>
+#include <drogon/HttpTypes.h>
+
+using namespace drogon;
+
+class health : public drogon::HttpSimpleController<health>
+{
+  public:
+    void asyncHandleHttpRequest(const HttpRequestPtr& req, std::function<void (const HttpResponsePtr &)> &&callback) override;
+    PATH_LIST_BEGIN
+    // list path definitions here;
+    PATH_ADD("/healthz", Get);
+    PATH_LIST_END
+};