You can do that by simply going to Menu & Pages -> Blog Pages -> Post Page.
On the Post Page you'll see your latest post. If you want something as similar as you shown on the picture, you just simply can add some text and images below the post. The same text and image will be shown below all of your posts on the live site.
That would only work if it is the same person writing every blog. Otherwise you will need to create a dataset with information for each author and add it to the bottom of the posts dynamically.
I am searching exactly this, but as I see there is not a solution
Hello @Revista Fluxo,
You can do that by simply going to Menu & Pages -> Blog Pages -> Post Page.
On the Post Page you'll see your latest post. If you want something as similar as you shown on the picture, you just simply can add some text and images below the post. The same text and image will be shown below all of your posts on the live site.
Hope this heps!
If you have any questions be sure to ask.