Add a short description of hercules in v4 blog post
Add a short description of hercules in v4 blog post

Signed-off-by: Vadim Markovtsev <fd4c965c24d66fe735cb85ca5a97b0672dcae74f@sourced.tech>

vmarkovtsev/blog,vmarkovtsev/blog,vmarkovtsev/blog,vmarkovtsev/blog