added serverjs

server.js

@@ -0,0 +1,84 @@
+const next = require("next");
+const { createServer } = require("http");
+const appInsights = require("applicationinsights");
+
+const initAppInsights = (instrumentationKey) => {
+  if (!instrumentationKey) {
+    return false;
+  }
+
+  appInsights
+    .setup(instrumentationKey)
+    .setAutoCollectConsole(true, true)
+    .setSendLiveMetrics(true)
+    .start();
+
+  return true;
+};
+
+const startServer = async (config) => {
+  const serverOptions = {
+    dev: config.env === "development",
+    dir: ".",
+    quiet: false,
+  };
+
+  const app = next(serverOptions);
+  const handleNextRequests = app.getRequestHandler();
+
+  const srv = createServer((req, res) => {
+    if (config.useAppInsights) {
+      appInsights.defaultClient.trackNodeHttpRequest({
+        request: req,
+        response: res,
+      });
+    }
+
+    handleNextRequests(req, res);
+  });
+
+  await new Promise((resolve, reject) => {
+    // This code catches EADDRINUSE error if the port is already in use
+    srv.on("error", reject);
+    srv.on("listening", () => resolve());
+    srv.listen(config.port, config.hostname);
+  });
+
+  // It's up to caller to run `app.prepare()`, so it can notify that the server
+  // is listening before starting any intensive operations.
+  return app;
+};
+
+const startTime = Date.now();
+
+const serverConfig = {
+  hostname: "localhost",
+  port: process.env.PORT || 3000,
+  env: process.env.APP_ENV || process.env.NODE_ENV || "production",
+  useAppInsights: initAppInsights(
+    process.env.NEXT_PUBLIC_APPINSIGHTS_INSTRUMENTATIONKEY
+  ),
+};
+
+startServer(serverConfig)
+  .then(async (app) => {
+    console.log(
+      `started server on host ${serverConfig.hostname}, port ${serverConfig.port}, env ${serverConfig.env}`
+    );
+
+    if (serverConfig.useAppInsights) {
+      const duration = Date.now() - startTime;
+
+      appInsights.defaultClient.trackMetric({
+        name: "server startup time",
+        value: duration,
+      });
+    }
+
+    await app.prepare();
+  })
+  .catch((err) => {
+    console.error(err);
+
+    process.exit(1);
+  });