fix: dotenv with debug

- by using debugFactory.debug as described here debug-js/debug#446 (comment)

templates/app.js

@@ -1,8 +1,6 @@
 `${
   opts.esm
-    ? `import * as dotenv from 'dotenv';
-    dotenv.config();
-    import createError from 'http-errors';
+    ? `import createError from 'http-errors';
 import express from 'express';
 import cookieParser from 'cookie-parser';
 import logger from 'morgan';
@@ -12,7 +10,7 @@ ${opts.helmet ? `import helmet from 'helmet';` : ``}
 import mainRouter from './routes/routes.js';
 ${opts.sequelize ? "import usersRouter from './routes/users.js';" : ''}
 `
-    : `require('dotenv').config();
+    : `
     const createError = require('http-errors');
 const express = require('express');
 const cookieParser = require('cookie-parser');

templates/bin/www.js

@@ -2,16 +2,22 @@
 
 ${
   opts.esm || ''
-    ? `import app from '../app.js';
-import _debug from 'debug';
+    ? `import dotenv from "dotenv";
+dotenv.config();
+import app from '../app.js';
+import debugFactory from 'debug';
 import http from 'http'; 
-
-const debug = _debug('${opts.projectName}:server');
 `
-    : `const app = require('../app');
-const debug = require('debug')('${opts.projectName}:server');
-const http = require('http');`
-} 
+    : `require('dotenv').config();
+const app = require('../app');
+const debugFactory = require('debug')
+const http = require('http');
+    `
+}
+
+const { DEBUG } = process.env;
+debugFactory.enable(DEBUG);
+const debug= debugFactory('${opts.projectName}:server');
 
 /** Normalize a port into a number, string, or false. */
 const normalizePort = (val) => {