sinatra nginx config

nginx.conf

upstream unicorn {
    server unix:/tmp/.sock fail_timeout=0;
}
server {
    listen 80;
    server_name xyz.org;
    rewrite ^(.*) https://$host$1 permanent;
}
server {
    client_max_body_size 100m;
    listen 443;
    server_name xyz.org;
    root /srv/http;
    ssl on;
    ssl_certificate     /etc/nginx/ssl/cert-flujos.org.crt;
    ssl_certificate_key /etc/nginx/ssl/flujos.org.key;

    location /audio {
        alias /srv/http/files;
        }
    location /upload {
        upload_pass   @sinatra;
        upload_store /tmp 1;
        upload_store_access group:r;
        upload_set_form_field $upload_field_name.name "$upload_file_name";
        upload_set_form_field $upload_field_name.content_type "$upload_content_type";
        upload_set_form_field $upload_field_name.path "$upload_tmp_path";
        upload_aggregate_form_field "$upload_field_name.md5" "$upload_file_md5";
        upload_aggregate_form_field "$upload_field_name.size" "$upload_file_size";
        upload_pass_form_field "^submit$|^description$";
        upload_cleanup 400 404 499 500-505;
    }

    try_files $uri/index.html $uri.html $uri @sinatra;

    location @sinatra {
        include proxy.conf;
        proxy_set_header X-Forwarded-Proto https;
        proxy_pass   http://unicorn;
    }
}