indexContent function
Default index file or something
Implementation
String indexContent(String projectName) => '''
<!DOCTYPE html>
<html>
<head>
<base href="\$FLUTTER_BASE_HREF" />
<meta charset="UTF-8" />
<meta content="IE=Edge" http-equiv="X-UA-Compatible" />
<meta name="description" content="A new Flutter project." />
<!-- iOS meta tags & icons -->
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black" />
<meta name="apple-mobile-web-app-title" content="testapp" />
<link rel="apple-touch-icon" href="icons/Icon-192.png" />
<!-- Favicon -->
<link rel="icon" type="image/png" href="favicon.png" />
<title>testapp</title>
<!-- <link rel="manifest" href="manifest.json"> -->
</head>
<body>
<script src="flutter_bootstrap.js" async></script>
</body>
</html>
''';