Center image

I got a Joomla 3.4 template website ([login to view URL]). Inside of this template, in a article of all my articles, I want to place a image on top of the articles. Here you can see a example: Link: [login to view URL] Explanation: On the right of the website, inside a green box (Bed & Breakfast), there is a little image on top of the green box (knife and fork). I just want the code (HTML and CSS), so I can place my own image inside my own website. The code shall work in: X-browser (Explorer, firefox, Chrome, Opera and so on). All devices (PC, MAC, tablets, smartphones and so on). Responsive with Bootstrap (image stay in same place, in all states of width in the website) Small and simple job :-) When the code is tested and working, I pay. Thanks: Flemming Jensen / extend2web