fix: custom port args

package.json

@@ -66,7 +66,6 @@
     ]
   },
   "dependencies": {
-    "dotenv": "^16.0.1",
     "express": "^4.18.1",
     "morgan": "^1.10.0"
   },

src/config/env.js

@@ -0,0 +1,11 @@
+const argv = require('../utils/argv');
+
+const DEFAULT_PORT = 8000;
+
+const portFromArguments = argv('port');
+
+if (portFromArguments) {
+  process.env.PORT = portFromArguments;
+} else {
+  process.env.PORT = DEFAULT_PORT;
+}

src/index.js

@@ -1,11 +1,18 @@
 #! /usr/bin/env node
 
-require('dotenv').config();
+// Makes the script crash on unhandled rejections instead of silently
+// ignoring them. In the future, promise rejections that are not handled will
+// terminate the Node.js process with a non-zero exit code.
+process.on('unhandledRejection', (err) => {
+  throw err;
+});
+
+require('./config/env');
 
 const express = require('express');
-const logger = require('./logger');
+const logger = require('./utils/logger');
 
-const PORT = process.env.npm_config_port ?? process.env.PORT;
+const PORT = process.env.PORT;
 
 const app = express();
 

src/utils/argv.js

@@ -0,0 +1,15 @@
+const process = require('process');
+
+const argv = (key) => {
+  // Return true if the key exists and a value is defined
+  if (process.argv.includes(`--${key}`)) return true;
+
+  const value = process.argv.find((element) => element.startsWith(`--${key}=`));
+
+  // Return null if the key does not exist and a value is not defined
+  if (!value) return null;
+
+  return value.replace(`--${key}=`, '');
+};
+
+module.exports = argv;