Nginx server directive, why does it throw an error?

Question

Nginx

Everything works, but I read the nginx documentation and came across a check of a separate configuration file, in my case nginx -t -c /etc/nginx/sites-available/webinme.ru - gives an error, although, as you can see below, separate configuration files are included in nginx default settings http block. What is the problem?

user www-data;
worker_processes auto;
pid /run/nginx.pid;
include /etc/nginx/modules-enabled/*.conf;

events {
  worker_connections 768;
  # multi_accept on;
}

http {

  ##
  # Basic Settings
  ##

  sendfile on;
  tcp_nopush on;
  tcp_nodelay on;
  keepalive_timeout 65;
  types_hash_max_size 2048;
  # server_tokens off;

  server_names_hash_bucket_size 64;
  # server_name_in_redirect off;

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

  ##
  # SSL Settings
  ##

  ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # Dropping SSLv3, ref: POODLE
  ssl_prefer_server_ciphers on;

  ##
  # Logging Settings
  ##

  access_log /var/log/nginx/access.log;
  error_log /var/log/nginx/error.log;

  ##
  # Gzip Settings
  ##

  gzip on;

  # gzip_vary on;
  # gzip_proxied any;
  # gzip_comp_level 6;
  # gzip_buffers 16 8k;
  # gzip_http_version 1.1;
  # gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;

  ##
  # Virtual Host Configs
  ##

  include /etc/nginx/conf.d/*.conf;
  include /etc/nginx/sites-enabled/*;
}


#mail {
#	# See sample authentication script at:
#	# http://wiki.nginx.org/ImapAuthenticateWithApachePhpScript
# 
#	# auth_http localhost/auth.php;
#	# pop3_capabilities "TOP" "USER";
#	# imap_capabilities "IMAP4rev1" "UIDPLUS";
# 
#	server {
#		listen     localhost:110;
#		protocol   pop3;
#		proxy      on;
#	}
# 
#	server {
#		listen     localhost:143;
#		protocol   imap;
#		proxy      on;
#	}
#}

server {
        listen 80;
        listen [::]:80;

        root /var/www/webinme.ru/html;
        index index.html index.php index.htm index.nginx-debian.html;
        server_name webinme.ru www.webinme.ru;
    error_log /var/www/webinme.ru/log/error/error.log info;
        
        location / {
                try_files $uri $uri/ =404;
                
  }
    location ~ \.php$ {
    include snippets/fastcgi-php.conf;
  #
  #	# With php-fpm (or other unix sockets):
    fastcgi_pass unix:/var/run/php/php7.2-fpm.sock;
  #	# With php-cgi (or other tcp sockets):
    #fastcgi_pass 127.0.0.1:9000;
  }

  # deny access to .htaccess files, if Apache's document root
  # concurs with nginx's one
  #
  location ~ /\.ht {
    deny all;
  }
  
}

Answer 1

-c is redundant. Either nothing or nginx.conf must be specified