Getting 404 after startup about nginx-php-fpm HOT 12 CLOSED

upstream fastcgi_backend {
    server 127.0.0.1:9000;
}

"upstream" directive is not allowed here in /etc/nginx/conf.d/default.conf

"upstream" directive is not allowed here in /etc/nginx/nginx.conf:13

web_1      | 2017/04/13 22:15:42 [crit] 18#18: *1 connect() to unix:/run/php/php7.0-fpm.sock failed (2: No such file or directory) while connecting to upstream, client: 172.17.0.1, server: _, request: "GET / HTTP/1.1", upstream: "fastcgi://unix:/run/php/php7.0-fpm.sock:", host: "localhost"
web_1      | 2017/04/13 22:15:42 [error] 18#18: *1 open() "/usr/share/nginx/html/50x.html" failed (2: No such file or directory), client: 172.17.0.1, server: _, request: "GET / HTTP/1.1", upstream: "fastcgi://unix:/run/php/php7.0-fpm.sock", host: "localhost"

user  nginx;
worker_processes 2;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}


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

    upstream fastcgi_backend {
       server 127.0.0.1:9000;
    }

    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  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    #gzip  on;

    include /etc/nginx/conf.d/*.conf;
}