Can someone explain me why "curl: (7) Failed to connect to 127.0.0.1 port 2000: Connection refused" ?

[MarcoI]

Hi!,

I do not understand why it says "curl: (7) Failed to connect to 127.0.0.1
port 2000: Connection refused" :
curl -X POST -F 'first_name=pinco' -F 'last_name=pallo' -F
'company_name=Company' -F 'email=pinco.pallo at company.com' -F 'tel=111111111'
127.0.0.1:2000/puser/add curl: (7) Failed to connect to 127.0.0.1 port 2000:
Connection refused.

In server-gorillamux.go : CONN_PORT = "2000"

in /etc/nginx/conf.d/default.conf :
 
    upstream golang-webserver {
        ip_hash;
        server 127.0.0.1:2000;
    }

    server {
        #listen 2999;
        server_name ggc.world;

        root /puser/add; // Is this correct?

        ssl_protocols TLSv1.2 TLSv1.3;
        ssl_ciphers
EECDH+CHACHA20:EECDH+CHACHA20-draft:EECDH+AES128:RSA+AES128:EECDH+AES256:RSA+AES256:EECDH+3DES:RSA+3DES:!MD5;
        ssl_prefer_server_ciphers on;
        ssl_session_cache shared:SSL:50m;

        location / {
            #proxy_pass http://127.0.0.1:8080;
            proxy_pass http://golang-webserver;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            #proxy_set_header Host $host;
        }
    }

Looking forward to your kind help.
Marco

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,288019,288019#msg-288019