我应该在Html中输入给定的apiKey来初始化Firebase的Firebase Web-App guide个状态:
// TODO: Replace with your project's customized code snippet
<script src="https://www.gstatic.com/firebasejs/3.0.2/firebase.js"></script>
<script>
// Initialize Firebase
var config = {
apiKey: '<your-api-key>',
authDomain: '<your-auth-domain>',
databaseURL: '<your-database-url>',
storageBucket: '<your-storage-bucket>'
};
firebase.initializeApp(config);
</script>
通过这样做，每一位访客都能看到apiKey.
purpose of that key是什么？它真的是meant to be public吗？