Dummy Puma server Sinatra Docker app. running on a socket - just plug your NginX. Good for debugging NginX config without connecting larger Puma app : r/nginx
NGINX vs Puma | What are the differences?
Please prove me wrong - but I cannot get NGINX,Puma, and websockets to work together · Issue #1804 · puma/puma · GitHub
NginxとRails(Puma)をソケット通信で連携させる方法! | キツネの惑星
GitHub - p8952/nginx-puma-sinatra: Example showing how to deploy a simple Sinatra application using Puma and Nginx
Docker + Rails + Puma + Nginx + Postgres | by Satendra Rai | ITNEXT