Good question in principle. It is quite difficult now to do something.
If you are a very qualified specialist, for example, in JS, then you can make an interesting resource on the subject, but the audience is small, and clients in a typical understanding there do not find. Work — Yes. Projects — is unlikely.
If you are just a normal spec without the subtle knowledge of such blogs already full. These "trends of web design for the year 2019", "Deal with arrow functions in JS" (2018, really?) and other vysery on the medium rather tired. All very superficial, all the same.