# The extension update server — rendered into the autotrader stack's nginx/conf.d
# by deploy.sh. Edit the template, not the rendered file.
server {
    listen 80;
    listen [::]:80;
    server_name ${EXT_HOST};

    location /.well-known/acme-challenge/ {
        root /var/www/certbot;
    }

    location / {
        return 301 https://$host$request_uri;
    }
}

server {
    listen 443 ssl;
    listen [::]:443 ssl;
    http2 on;
    server_name ${EXT_HOST};

    ssl_certificate     /etc/letsencrypt/live/${EXT_HOST}/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/${EXT_HOST}/privkey.pem;
    ssl_protocols       TLSv1.2 TLSv1.3;
    ssl_prefer_server_ciphers off;
    ssl_session_cache   shared:SSL:10m;
    ssl_session_timeout 1d;

    add_header Strict-Transport-Security "max-age=31536000" always;
    add_header X-Content-Type-Options "nosniff" always;

    # Two public files: the update manifest and the signed CRX. Both are meant to
    # be readable by anyone — Chrome fetches them with no cookies and no way to
    # authenticate, which is why there is no auth here. The CRX is signed, and
    # carries no credentials; the private key stays on the droplet.
    location / {
        proxy_pass         http://autofirmer-updates/;
        proxy_http_version 1.1;
        proxy_set_header   Host $host;
        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;
    }
}