nginx.conf

worker_processes  1;
error_log  logs/error.log;
pid        logs/nginx.pid;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  logs/access.log  main;

    sendfile        on;
    keepalive_timeout  65;
    gzip  on;

    # 20 MB upload limit
    client_max_body_size 20m;

    server {
        listen       80;
        server_name  localhost;

	# Proxy POST requests to S3
	location /upload/ {
	    proxy_pass http://BUCKET-NAME.s3.amazonaws.com/;
	}

	# Web-app for upload form and success message
        location / {
	    proxy_pass http://localhost:5000/;
 	    proxy_set_header Host $http_host;
        }

        # redirect server error pages to the static page /50x.html
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

        # redirect server error pages to the static page /40x.html
        error_page   400 413 /40x.html;
        location = /40x.html {
            root   html;
        }
    }
}