Headscale NGINX Reverse Proxy Configuration

map $http_upgrade $connection_upgrade {
    default      upgrade;
    ''           close;
}

server {
    listen 80;
    listen [::]:80;

    listen 443      ssl;
    listen [::]:443 ssl;

    http2 on;

    server_name {{ item.server_name }};

    ssl_certificate /etc/nginx/ssl/{{ item.certificate }}/fullchain.pem;
    ssl_certificate_key /etc/nginx/ssl/{{ item.certificate }}/key.pem;
    ssl_protocols TLSv1.2 TLSv1.3;

    location / {
        proxy_pass {{ item.proxy_pass }};
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
        proxy_set_header Host $server_name;
        proxy_redirect http:// https://;
        proxy_buffering off;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        add_header Strict-Transport-Security "max-age=15552000; includeSubDomains" always;
    }
}