How to configure my domain in nginx

Hi, I am trying to upload my web application then I’ve used your tutorial “https://www.digitalocean.com/community/tutorials/how-to-install-nginx-on-centos-8” in the Step - 6 as example I created my domain.conf but after to saving and closing the file I tested the nginx to see syntax errors and I getting this error:

nginx: [emerg] "server" directive is not allowed here in /etc/nginx/conf.d/itcmedbr.com.conf:1
nginx: configuration file /etc/nginx/nginx.conf test failed

Below my conf file:

vi /etc/nginx/conf.d/itcmedbr.com.conf

1 server {
      2         listen 80;
      3         listen [::]:80;
      4
      5         root /var/www/itcmedbr.com/html;
      6         index index.jsp;
      7
      8         server_name itcmedbr.com www.itcmedbr.com;
      9
     10         location / {
     11                 try_files $uri $uri/ =404;
     12         }
     13 }
~

This is my nginx.conf:

      1 # For more information on configuration, see:
      2 #   * Official English Documentation: http://nginx.org/en/docs/
      3 #   * Official Russian Documentation: http://nginx.org/ru/docs/
      4
      5 user nginx;
      6 worker_processes auto;
      7 error_log /var/log/nginx/error.log;
      8 pid /run/nginx.pid;
      9
     10 ##
     11 # Virtual hosts configs
     12 ##
     13 include /etc/nginx/conf.d/*.conf;
     14 include /etc/nginx/sites-enabled/*;
     15
     16 # Load dynamic modules. See /usr/share/doc/nginx/README.dynamic.
     17 include /usr/share/nginx/modules/*.conf;
     18
     19 events {
     20     worker_connections 1024;
     21 }
     22
     23 http {
     24     log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
     25                       '$status $body_bytes_sent "$http_referer" '
     26                       '"$http_user_agent" "$http_x_forwarded_for"';
     27
     28     access_log  /var/log/nginx/access.log  main;
     29
     30     sendfile            on;
     31     tcp_nopush          on;
     32     tcp_nodelay         on;
     33     keepalive_timeout   65;
     34     types_hash_max_size 2048;
     35
     36     include             /etc/nginx/mime.types;
     37     default_type        application/octet-stream;
     38     include /etc/nginx/sites-enabled/*.*;
     39
     40     # Load modular configuration files from the /etc/nginx/conf.d directory.
     41     # See http://nginx.org/en/docs/ngx_core_module.html#include
     42     # for more information.
     43     include /etc/nginx/conf.d/*.conf;
     44
     45     server {
     46         listen       80 default_server;
     47         listen       [::]:80 default_server;
     48
     49         server_name  _;
     50         root         /usr/share/nginx/html;
     51     }
     52
     53     server {
     54         server_name  itcmedbr.com www.itcmedbr.com;
     55         root         /var/www/;
     56
     57         # Load configuration files for the default server block.
     58         include /etc/nginx/default.d/*.conf;
     59
     60         location / {
     61             proxy_pass http://myipaddress:8080;
     62
     63         }
     64
     65         error_page 404 /404.html;
     66             location = /40x.html {
     67         }
     68
     69         error_page 500 502 503 504 /50x.html;
     70             location = /50x.html {
     71         }
     72     }
     73
     74 # Settings for a TLS enabled server.
     75 #
     76 #    server {
     77 #        listen       443 ssl http2 default_server;
     78 #        listen       [::]:443 ssl http2 default_server;
     79 #        server_name  _;
     80 #        root         /usr/share/nginx/html;
     81 #
     82 #        ssl_certificate "/etc/pki/nginx/server.crt";
     83 #        ssl_certificate_key "/etc/pki/nginx/private/server.key";
     84 #        ssl_session_cache shared:SSL:1m;
     85 #        ssl_session_timeout  10m;
     86 #        ssl_ciphers PROFILE=SYSTEM;
     87 #        ssl_prefer_server_ciphers on;
     88 #
     89 #        # Load configuration files for the default server block.
     90 #        include /etc/nginx/default.d/*.conf;
     91 #
     92 #        location / {
     93 #        }
     94 #
     95 #        error_page 404 /404.html;
     96 #            location = /40x.html {
     97 #        }
     98 #
     99 #        error_page 500 502 503 504 /50x.html;
    100 #            location = /50x.html {
    101 #        }
    102 #    }
    103
    104 }

I realy need help. Thanks and best regards.