add config

Author: m99coder

src/app.ts

@@ -6,6 +6,7 @@ import {
 } from "fastify-type-provider-zod";
 import { z } from "zod/v4";
 
+import config, { DurationGranularity } from "./config";
 import headersRoute from "./routes/headers";
 import healthCheckRoute from "./routes/health";
 import codesRoute from "./routes/codes";
@@ -25,8 +26,11 @@ const createServer = (opts: FastifyServerOptions = {}) => {
 
   // add custom properties to keep track of timings
   fastify.decorateReply("startTime", 0);
-  // fastify.decorateReply("getTime", () => performance.now());
-  fastify.decorateReply("getTime", () => Date.now());
+  fastify.decorateReply("getTime", () =>
+    config.server.durationGranularity === DurationGranularity.Default
+      ? Date.now()
+      : performance.now()
+  );
 
   // custom logging using hooks
   fastify.addHook("onRequest", (req, res, done) => {

src/config.ts

@@ -0,0 +1,26 @@
+import env from "./env";
+
+const HOST: string = env.HOST;
+const PORT: number = env.PORT;
+
+export enum DurationGranularity {
+  Default = "default",
+  High = "high",
+}
+type Config = {
+  server: {
+    host: string;
+    port: number;
+    durationGranularity: DurationGranularity;
+  };
+};
+
+const config: Config = {
+  server: {
+    host: HOST,
+    port: PORT,
+    durationGranularity: DurationGranularity.Default,
+  },
+};
+
+export default config;

src/server.ts

@@ -1,9 +1,6 @@
 // import EventEmitter from "events";
 import createServer from "./app";
-import env from "./env";
-
-const HOST: string = env.HOST;
-const PORT: number = env.PORT;
+import config from "./config";
 
 const start = async () => {
   const fastify = createServer({
@@ -67,7 +64,10 @@ const start = async () => {
   // START ---
 
   try {
-    await fastify.listen({ port: PORT, host: HOST });
+    await fastify.listen({
+      port: config.server.port,
+      host: config.server.host,
+    });
   } catch (err) {
     throw err;
   }