feat: update PORT configuration in .env.example and add ecosystem.config.js for process management

Author: pphatdev

.env.example

@@ -1,3 +1,3 @@
 GITHUB_TOKEN=your_github_personal_access_token_here
-PORT=3000
+PORT=3102
 APP_ENV=development

ecosystem.config.js

@@ -0,0 +1,26 @@
+module.exports = {
+    apps: [
+        {
+            name: 'github-stats',
+            script: './dist/index.js',
+            instances: 'max',
+            exec_mode: 'cluster',
+            autorestart: true,
+            watch: false,
+            max_memory_restart: '1G',
+            env_production: {
+                NODE_ENV: 'production',
+                PORT: 3102
+            },
+            error_file: './logs/err.log',
+            out_file: './logs/out.log',
+            log_file: './logs/combined.log',
+            time: true,
+            merge_logs: true,
+            kill_timeout: 5000,
+            wait_ready: true,
+            listen_timeout: 10000,
+            shutdown_with_message: true
+        }
+    ],
+};