datacenter -> acme -> set up account
node -> certs -> clicky with menus
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then use pveproxy-ssl.pem/key in nginx config



upstream proxmox {
    server pve8.fiber.house;
}
 
server {
    listen 80 default_server;
    rewrite ^(.*) https://$host$1 permanent;
}
 
server {
    listen 443 ssl;
    server_name pve8.fiber.house;
 
    ssl_certificate /etc/pve/nodes/pve8/pveproxy-ssl.pem;
    ssl_certificate_key /etc/pve/nodes/pve8/pveproxy-ssl.key;
 
    proxy_redirect off;
 
    location / {
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_pass https://127.0.0.1:8006;
        proxy_buffering off;
 
        client_max_body_size 0;
 
        proxy_connect_timeout 3600s;
        proxy_read_timeout 3600s;
        proxy_send_timeout 3600s;
        send_timeout 3600s;
    }
}