Thank you! I mainly build it to learn GraphQL and Postgres for myself. But if people are interested, I could share the source in the future.
There is even a movement that thinks building a HN reader is "A spiritual successor to TodoMVC".[1] I don't know if that is of any interest to you but I thought leave that here.
Unfortunately I won't be able to submit the project to https://hnpwa.com since they only allow (more or less) direct copies of HackerNews to their directory. [1]