Most law companies do that by including the Instagram icon (obtain the official one here) to the header or footer of their website. https://xn--L3ca4b8epb5b.com/category/%E0%B8%84%E0%B8%A5%E0%B8%B4%E0%B8%9B%E0%B8%AB%E0%B8%A5%E0%B8%B8%E0%B8%94/