I think this is considered perfectly OK on StackOverflow. Some relevant meta questions from there:
- Moving a personal technical blog to stackoverflow / serverfaultMoving a personal technical blog to stackoverflow / serverfault
- How do you stop people from asking and answering their own questions en masse?How do you stop people from asking and answering their own questions en masse?
- Should I not answer my own questions?Should I not answer my own questions?
Why give other people a chance to answer before you post the answer if you already know it? The point of the site is not to create busy work for others.