Nginx connects successfully with curl, but times out of browser

##
# You should look at the following URL's in order to grasp a solid understanding
# of Nginx configuration files in order to fully unleash the power of Nginx.
# # https://www.nginx.com/resources/wiki/start/
# # https://www.nginx.com/resources/wiki/start/topics/tutorials/config_pitfalls/
# # https://wiki.debian.org/Nginx/DirectoryStructure
#
# In most cases, administrators will remove this file from sites-enabled / and
# leave it as reference inside of sites-available where it will continue to be
# updated by the nginx packaging team.
#
# This file will automatically load configuration files provided by other
# applications, such as Drupal or Wordpress. These applications will be made
# available under a path with that package name, such as/drupal 8.
#
# Please see /usr/share/doc/nginx-doc/examples/for more detailed examples.
##

# Default server configuration
#
server{
        listen80 default_server;
        listen [::]:80 default_server;

        # SSL configuration
        #
        # listen443 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 secure a secure configuration.
        # See: https://bugs.debian.org/765782
        #
        # Self-signed certificates generated by the ssl-cert package
        # Don't use them in a production server!
        #
        # include snippets/snakeoil.conf;

        root/var/www/html;

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

        server_name_;

        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:/var/run/php/php 7.0-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;
        #}
}


# Virtual Host configuration for example.com
#
# You can move that to a different file under sites-available/and symlink that
# to sites-enabled/to enable it.
#
# server {
#       listen80;
#       listen [::]:80;
#
#       server_name example.com;
#
#       root/var/www/example.com;
#       index index.html;
#
#       location / {
#               try_files$uri$uri/=404;
#       }
#}