topic thumbnail doesn't show on facebook share

<baris>

This is what the facebook debugger says.

The provided 'og:image' properties are not yet available because new images are processed asynchronously. To ensure shares of new URLs include an image, specify the dimensions using 'og:image:width' and 'og:image:height' tags. Learn More

Looks like we need to add those to our header.

https://github.com/NodeBB/NodeBB/issues/5121

Krissanawat Kaewsanmuang

Where file location i can fix it