[develop | DONE | ADDED] add /health-check method

server.ts

@@ -198,6 +198,30 @@ export function app() {
       buildCss(req.params.id, req.params.suffix, variables);
       res.status(200).send({code: 200, message: 'CSS build for ' + req.params.id + ' layout was successful'});
   });
+  server.get('/health-check', async (_req, res, _next) => {
+    var uptime = process.uptime();
+    const date = new Date(uptime*1000);
+    const days = date.getUTCDate() - 1,
+      hours = date.getUTCHours(),
+      minutes = date.getUTCMinutes(),
+      seconds = date.getUTCSeconds(),
+      milliseconds = date.getUTCMilliseconds();
+
+
+    const healthcheck = {
+      uptime: days + " days, " + hours + " hours, " + minutes + " minutes, " + seconds + " seconds, " + milliseconds + " milliseconds",
+      message: 'OK',
+      timestamp: new Date()
+    };
+    try {
+      res.send(healthcheck);
+    } catch (error) {
+      healthcheck.message = error;
+      res.status(503).send();
+    }
+  });
+
+
   // Example Express Rest API endpoints
   // server.get('/api/**', (req, res) => { });
   // Serve static files from /browser