heres my nginx reverse proxy setup

server {
    listen 443 ssl;


   server_name servername.mydomain.tld
   ssl_certificate  mycert
   ssl_certificate_key  mykey
   ssl_prefer_server_ciphers on;
   ssl_protocols       TLSv1 TLSv1.1 TLSv1.2;
   ssl_ciphers         HIGH:!aNULL:!MD5;
    location / {
        proxy_pass <https://127.0.0.1:2443>;
        proxy_ssl_verify              off;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Forwarded-Port $server_port;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
         # This allows the ability for the execute shell window to remain open for up to 15 minutes. Without this parameter, the default is 1 minute and will automatically close.
        proxy_read_timeout 900s;
        proxy_buffering off;

    }
}

if someone has an idea what i'm doing wrong....