“Register on Hacker News, create a new post — just submit 'Show HN' and the name of the project — and then link to your GitHub repository, not your main website… if you put your open source project in there, there's a very high chance you will get into the main feed.”

Show HN should link your GitHub repo — not your marketing site

Hacker News loves open-source projects but is picky about what gets promoted. Submit a Show HN that points directly to the GitHub repo rather than a marketing site, and a front-page slot can deliver roughly 10,000 views in a single day.