added logging feature

.gitignore

@@ -2,4 +2,4 @@ node_modules
 npm-debug.log
 *.pem
 .env
-test.js
+logs

index.js

@@ -2,6 +2,9 @@ const { App } = require("octokit");
 require("dotenv").config();
 const githubBot = require("./githubBot");
 const express = require("express");
+const logger = require('./utils/logger');
+const path = require("path");
+const fs = require("fs");
 
 const app = express();
 app.use(express.json());
@@ -17,14 +20,36 @@ const bot = new App({
   webhooks: { secret: process.env.webhookSecret },
 });
 
+// Middleware function to log response details
+app.use((req, res, next) => {
+    const oldSend = res.send;
+    res.send = function (data) {
+      logger.info(`Response for ${req.method} ${req.url}:`);
+      logger.info(data);
+      oldSend.apply(res, arguments);
+    };
+    next();
+  });
+
 app.post('/', async (req, res) => {
   const { headers: { 'x-github-event': name }, body: payload } = req;
   const octokit = await bot.getInstallationOctokit(payload.installation.id);
   githubBot(name, octokit, payload);
+  logger.info(`Received ${name} event from Github`);
   res.send('ok');
 });
 
-app.listen(process.env.PORT, () =>
-  console.info(`App listening on PORT:${process.env.PORT}`)
-);
+app.get('/logs', (req, res) => {
+  const logFile = path.join(__dirname, 'logs/app.log.2023-03-24');
+  fs.readFile(logFile, 'utf8', (err, data) => {
+    if (err) {
+      logger.error(err);
+      return res.status(500).send('Error reading log file');
+    }
+    res.send(`<pre>${data}</pre>`);
+  });
+});
 
+app.listen(process.env.PORT, () =>
+  logger.info(`App listening on PORT:${process.env.PORT}`)
+);