Hi Islam.
Devblog is just what you need.
Devblog is a simple blogging platform that is free, fast and offers independence to developers.
It is optimized for developers and you’ll get access to features such as Markdown editor, syntax highlighting, gist embedding and much more.
You will also get a free SSL certificate and a CDN which makes your blog super fast.
You can read more about Devblog and get started here