Use if to inspect if liker_id exists. Then add the code to the post template, find a place near the end of the post template and add {% include likeco.html %} to include the LikeCoin button.
Build the website, and the LikeCoin button will be added at the end of each article. However, the size may need adjustment. The LikeCoin button will adapt itself to a width of 485px and a height of 240px. Use the following code to align it to the middle and hide the scroll bar.