http {
    server {
        listen 80;
        rewrite ^([^.]*[^/])$ $1/ permanent;
        
        location /dev/ {
            proxy_pass http://miempresa.com:8080/;
            proxy_set_header   Host $host;
            proxy_set_header   X-Real-IP $remote_addr;
            proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header   X-Forwarded-Host $server_name;
        }
    }
    ...
}