Forward nginx to tomcat doesn't work

Hallo,

I configured tomcat with nginx like mentioned in the following tutorials:

https://www.digitalocean.com/community/tutorials/how-to-secure-nginx-with-let-s-encrypt-on-centos-7 https://www.digitalocean.com/community/tutorials/how-to-encrypt-tomcat-8-connections-with-apache-or-nginx-on-centos-7

My nginx config file now looks like this

# Load modular configuration files from the /etc/nginx/conf.d directory.
    # See http://nginx.org/en/docs/ngx_core_module.html#include
    # for more information.
    include /etc/nginx/conf.d/*.conf;

    upstream tomcat {
    server 127.0.0.1:8080 fail_timeout=0;
    }

    server {
        listen       80 default_server;
        listen       [::]:80 default_server;
        server_name  hades.pcoenenmedia.be demo.depannage.be;
        root         /usr/share/nginx/html;

        # Load configuration files for the default server block.
        include /etc/nginx/default.d/*.conf;

        location / {
           #try_files $uri $uri/ =404;
        proxy_pass http://tomcat/;
        proxy_set_header Host $http_host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        }

When I restart nginx and go to my website, I get the following error:

“The page you are looking for is temporarily unavailable. Please try again later.”

While my tomcat server is online.

You can see this on the website:

https://demo.depannage.be

My tomcat is online at:

http://demo.depannage.be:8080