I know that the TeX Stack Exchange has a fairly active community of linguists contributing to it. There are also many TeX experts who are not linguists, who can contribute to solving problems. I assume there is a similar site for web design/HTML.
Questions that are purely about formatting belong on another Stack Exchange website, since there is nothing inherently linguistic about them. They will also benefit from the participation of people with no interest in linguistics, but a knowledge of a particular formatting language.