<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Counter App</title>
    <link
      href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css"
      rel="stylesheet"
    />
  </head>
  <body>
    <div class="container mt-5">
      <div class="row justify-content-center">
        <div class="col-md-6">
          <div class="card text-center">
            <div class="card-header"