Hi!!

Due to some issues in packages installed which caused the freezing of the system, I had to re-install Ubuntu from scratch.

Now the previous nginx configuration, which previously worked fine, gives this error:

ginx: [emerg] a duplicate default server for 0.0.0.0:80 in /etc/nginx/conf.d/default.conf:54
nginx: configuration file /etc/nginx/nginx.conf test failed


This is /etc/nginx/conf.g/default.conf :

server {
listen 443 ssl http2 default_server;
server_name grasp.deals;
ssl_certificate /etc/letsencrypt/live/grasp.deals/fullchain.pem; # managed by Certbot
ssl_certificate_key /etc/letsencrypt/live/grasp.deals/privkey.pem; # managed by Certbot

ssl_trusted_certificate /etc/letsencrypt/live/grasp.deals/chain.pem;

ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

ssl_session_timeout 5m;
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;
#ssl_stapling on;
#ssl_stapling_verify on;

access_log /var/log/nginx/graspdeals-access.log combined;

add_header Strict-Transport-Security "max-age=31536000";
location = /favicon.ico { access_log off; log_not_found off; }

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

# http://nginx.org/en/docs/http/ngx_http_core_module.html#try_files
# https://unix.stackexchange.com/questions/585963/nginx-configuration-how-to-load-static-files-other-than-index-html/586567#586567
location /weights {
root /home/raphy/www;
try_files $uri $uri/ =404;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
# Following is necessary for Websocket support
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
}

}

server {
if ($host = grasp.deals) {
return 301 https://$host$request_uri;
} # managed by Certbot


listen 80 default_server;
listen [::]:80 default_server;
error_page 497 https://$host:$server_port$request_uri;
server_name ggc.world;
return 301 https://$server_name$request_uri;

access_log /var/log/nginx/grapdeals-access.log combined;

add_header Strict-Transport-Security "max-age=31536000";
location = /favicon.ico { access_log off; log_not_found off; }

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

# https://www.nginx.com/blog/nginx-nodejs-websockets-socketio/
# https://gist.github.com/uorat/10b15a32f3ffa3f240662b9b0fefe706
# http://nginx.org/en/docs/stream/ngx_stream_core_module.html

upstream websocket {
ip_hash;
server localhost:3000;
}

server {
listen 81;
server_name grasp.deals;

#location / {
location ~ ^/(websocket|websocket\/socket-io) {
proxy_pass http://127.0.0.1:4201;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header X-Forwared-For $remote_addr;
proxy_set_header Host $host;

proxy_redirect off;
proxy_set_header X-Real-IP $remote_addr;
}
}
# https://stackoverflow.com/questions/40516288/webpack-dev-server-with-nginx-proxy-pass

upstream golang-webserver {
ip_hash;
server 127.0.0.1:2000;
}

server {

root /puser/add;

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://golang-webserver;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
#proxy_set_header Host $host;
}
}


What's the problem with this nginx configuration?