NGINX conf for Shiny App + RStudio + Preview (RunApp) with reverse proxy

shiny.conf

# /etc/nginx/conf.d/shiny.conf

map $http_upgrade $connection_upgrade {
  default upgrade;
  '' close;
}

server {
    listen 80;
    listen [::]:80 ipv6only=on;
    server_name *.eu-west-1.compute.amazonaws.com;
    location / {
        proxy_set_header HOST $host;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass http://127.0.0.1:3838;
        proxy_http_version 1.1;
        proxy_read_timeout 20d;
    }

    rewrite ^/rstudio$ $scheme://$http_host/rstudio/ permanent;

    location /rstudio/ {
      rewrite ^/rstudio/(.*)$ /$1 break;
      proxy_pass http://localhost:8787;
      proxy_redirect http://localhost:8787/ $scheme://$http_host/rstudio/;
      proxy_http_version 1.1;
      proxy_read_timeout 20d;
    }

    rewrite ^/preview$ $scheme://$http_host/preview/ permanent;

    location /preview/ {
      rewrite ^/preview/(.*)$ /$1 break;
      proxy_pass http://localhost:1234;
      proxy_redirect http://localhost:1234/ $scheme://$host/preview/;
      proxy_http_version 1.1;

      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection $connection_upgrade;
      proxy_read_timeout 20d;
    }
}