Tune image output for social links

[squakez]

Right now the result would be like this: We must work on improving the image (which is required to be 1080p to render automatically).

Originally posted by @squakez in https://github.com/apache/camel-website/issues/767#issuecomment-1022310649

[squakez]

Have a look at https://developers.facebook.com/docs/sharing/best-practices#images for possible solution

[squakez]

I think the problem is uniquely with Twitter that does not like meta property but prefers meta name: https://stackoverflow.com/a/66816822/10974363 - I will have a look later to see if we can include also twitter:image meta beside the og:image

[zregvart]

I don't think this is the issue, I think the og:image should be an absolute URL, which it currently is not.

[squakez]

I'll make some experiment and use the validator to see how it renders with all options highlighted in this issue.