2017/12/18 16:30:06 [crit] 27927#27927: *25 connect() to unix:/webapps/theband/run/gunicorn.sock failed (2: No such fil$/ HTTP/1.1", upstream: "http://unix:/webapps/theband/run/gunicorn.sock:/", host: "207.154.232.99"

from django.conf.urls import include, url, handler404, handler500
from .views import error_404, error_500 -- into views was that {

    from django.shortcuts import render
    def error_404(request):
            return render(request,'error_404.html')
    def error_500(request):
            return render(request,'error_500.html')
}
also in urls.py was this:
handler404 = error_404
handler500 = error_500

upstream theband {
  # fail_timeout=0 means we always retry an upstream even if it failed
  # to return a good HTTP response (in case the Unicorn master nukes a
  # single worker for timing out).

  server unix:/webapps/theband/run/gunicorn.sock fail_timeout=0;
}

server {

    listen   80;
    server_name 207.154.232.99;
    client_max_body_size 4G;

    access_log /webapps/theband/logs/nginx-access.log;
    error_log /webapps/theband/logs/nginx-error.log;

    location /static/ {
        alias   /webapps/theband/static/;
    }

    location /media/ {
        alias   /webapps/theband/media/;
    }
    location / {
        # an HTTP header important enough to have its own Wikipedia entry:
        #   http://en.wikipedia.org/wiki/X-Forwarded-For
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        # enable this if and only if you use HTTPS, this helps Rack
        # set the proper protocol for doing redirects:
        # proxy_set_header X-Forwarded-Proto https;

        # pass the Host: header from the client right along so redirects
        # can be set properly within the Rack application
        proxy_set_header Host $http_host;

        # we don't want nginx trying to do something clever with
        # redirects, we set the Host: header above already.
        proxy_redirect off;

        # set "proxy_buffering off" *only* for Rainbows! when doing
        # Comet/long-poll stuff.  It's also safe to set if you're
        # using only serving fast clients with Unicorn + nginx.
        # Otherwise you _want_ nginx to buffer responses to slow
        # clients, really.
        # proxy_buffering off;
        # we don't want nginx trying to do something clever with
        # redirects, we set the Host: header above already.
        proxy_redirect off;

        # set "proxy_buffering off" *only* for Rainbows! when doing
        # Comet/long-poll stuff.  It's also safe to set if you're
        # using only serving fast clients with Unicorn + nginx.
        # Otherwise you _want_ nginx to buffer responses to slow
        # clients, really.
        # proxy_buffering off;

        # Try to serve static files from nginx, no point in making an
        # *application* server like Unicorn/Rainbows! serve static files.
        if (!-f $request_filename) {
            proxy_pass http://theband;
            break;
        }
    }
    error_page 404 /error_404.html;
    location = /error_404.html {
        root /webapps/theband/src/templates;
    }

    # Error pages
    error_page  500 502 503 504 /error_500.html;
    location = /error_500.html {
        root /webapps/theband/src/templates;
    }
}