Update README.md

README.md

@@ -38,6 +38,16 @@ module.exports = {
     return `https://example.com/${date.format('YYYY-MM-DD')}/channel/${channel.site_id}.html`
   },
 
+  /**
+   * @param {object} channel Data about the requested channel
+   * @param {string} content The response received after the request at the above url
+   *
+   * @return {string} The function should return URL of the channel logo (optional)
+   */
+  logo: function ({ channel, content }) {
+    return `https://example.com/logos/${channel.site_id}.png`
+  },
+
   /**
    * @param {string} content The response received after the request at the above url
    *