[Author here] This post was quite a surprise to see here! Guess who got busy checking out his old repository ;) . This is a blog post from 2019 during my Nim journey, which has now resulted in our entire SaaS[0] running Nim. Nim[1] has evolved a lot since the post - current stable 1.6.4, blog post was for 0.19.2.
[0] https://cxplanner.com [1] https://nim-lang.org