如何检索存储在Firebase数据库中的URL，然后填充图像标记的src？

<script src="https://www.gstatic.com/firebasejs/9.0.2/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/9.0.2/firebase-database.js"></script>

const firebaseConfig = {
  apiKey: "YOUR_API_KEY",
  authDomain: "YOUR_AUTH_DOMAIN",
  databaseURL: "YOUR_DATABASE_URL",
  projectId: "YOUR_PROJECT_ID",
  storageBucket: "YOUR_STORAGE_BUCKET",
  messagingSenderId: "YOUR_MESSAGING_SENDER_ID",
  appId: "YOUR_APP_ID"
};

firebase.initializeApp(firebaseConfig);

const database = firebase.database();
const urlRef = database.ref("path/to/url");

urlRef.once("value", (snapshot) => {
  const url = snapshot.val();
  // 将URL填充到图像标记的src
  const image = document.getElementById("image");
  image.src = url;
});

<img id="image" src="" alt="Image">