just like this:

just like this:

It would be helpful to have meta tags like these.
<meta data-rh="true" name="twitter:image" content="https://answer.apache.org/assets/images/[email protected]">
Is it gonna work if I put these code in "admin dashboard > customize > css/html >header"?
Not really sure, but you can give it a try. Because Answer's blog documentation is not built using Answer.