我在kali linux上安装了Nginx服务器，我通过在浏览器中输入localhost来访问它。然后我安装了Adminer，以便以图形方式管理我的数据库，但当我在浏览器中输入http://localhost/adminer时，我收到了404 Not found。
我不知道我在哪里错过了！
这里是我的/etc/nginx/sites-available的内容

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

# SSL configuration
#
# listen 443 ssl default_server;
# listen [::]:443 ssl default_server;
#
# Note: You should disable gzip for SSL traffic.
# See: https://bugs.debian.org/773332
#
# Read up on ssl_ciphers to ensure a secure configuration.
# See: https://bugs.debian.org/765782
#
# Self signed certs generated by the ssl-cert package
# Don't use them in a production server!
#
# include snippets/snakeoil.conf;

root /usr/share/adminer;

# Add index.php to the list if you are using PHP
index index.html index.htm index.nginx-debian.html;

server_name localhost;

location / {
    # First attempt to serve request as file, then
    # as directory, then fall back to displaying a 404.
    try_files $uri $uri/ =404;
}

# pass PHP scripts to FastCGI server
#
location ~ \.php$ {
    include snippets/fastcgi-php.conf;

    # With php-fpm (or other unix sockets):
    fastcgi_pass unix:/run/php/php7.4-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;
#}
}

这里是/log/nginx/error.log的内容

2020/09/02 07:43:47 [error] 71583#71583: *1 "/usr/share/nginx/html/adminer/index.html" is 
 not found (2: No such file or directory), client: ::1, server: , request: "GET /adminer/ 
 HTTP/1.1", host: "localhost"

根据错误消息，它的/usr/share/nginx/html目录不包含adminer文件夹，这是真的，因为我没有这个文件夹在该位置。所以我不知道为什么Nginx在那里寻找它，或者它是否应该在那里;如果是这样，为什么它不在那里？我怎么解决这个问题？