Feature: add OpenGraph-metatags to site header #29
Description
One may like or dislike the social media site that is promoting OpenGraph API, but nevertheless I would recommend to implement those metatags for tosback.org to make it more appealing to share the site.
Above all I would suggest to implement an og:image tag which links to the logo of the service (or possible more appealing "marketing images"). As of now logos of the services that are tested are displayed in the preview, which is rather misleading.
https://developers.facebook.com/docs/sharing/opengraph/object-properties