index.ejs

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <link rel="stylesheet" type="text/css" href="css/node_modules/bootswatch/dist/darkly/bootstrap.min.css" id="linkStylesheet">
    <title><%- htmlWebpackPlugin.options.metadata.title %></title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <base href="<%- htmlWebpackPlugin.options.metadata.baseUrl %>">
    <script src="https://cdn.polyfill.io/v2/polyfill.min.js"></script>
    <!-- imported CSS are concatenated and added automatically -->
  </head>
  <body aurelia-app="main">
    <% if (htmlWebpackPlugin.options.metadata.server) { %>
    <!-- Webpack Dev Server reload -->
    <script src="/webpack-dev-server.js"></script>
    <% } %>
  </body>
</html>