nginx redirect www to non-www - node.js

Question

i have nginx config on my server, but i'm facing an issue with the url
if access my domain directly using example.com it works (not secure - i have to redirect to https)
also if i tried to access it directly using www.example.com, it won't work and i got this message
so mainly i have two issues:
redirect non-http to https
and redirect www to non-www
my server running nodejs app
This site can’t be reached www.example.com’s server IP address could not be
found. DNS_PROBE_FINISHED_NXDOMAIN
server {
listen 80;
listen 443 ssl;
server_name www.example.com;
ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem; # managed by Certbot
ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem; # managed by Certbot
return 301 $scheme://example.com$request_uri;
}
server {
listen 80;
server_name example.com;
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;
proxy_cache_bypass $http_upgrade;
proxy_redirect off;
}
location /api {
proxy_pass http://127.0.0.1:3000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
proxy_redirect off;
}
listen 443 ssl; # managed by Certbot
ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem; # managed by Certbot
ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem; # managed by Certbot
include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
}

Answer 1

To redirect to https, you should have a server block with all your config and listen 443 ssl; in it, and another server block with config like this one:
server {
return 301 https://$host$request_uri;
server_name example.com
listen 80;
}
The www site is a different domain, you should set the ip address to it in your dns server.
Your config for the www site looks ok