Domains, SSL & Final Checks

1. Firebase console → Hosting → pick the site → Add custom domain.
2. Enter the domain (for example admin.yourdomain.com) and continue.
3. Add the TXT record Firebase shows at your domain provider to prove you own it, then the A records it gives you.
4. Wait until the domain shows Connected (minutes to a few hours). Repeat for each site.

SSL is free, automatic and renews by itself. Once the domain is Connected, HTTPS works with no extra step.

At your domain provider, add an A record per subdomain pointing to your server's public IP:

Type: A   Host: admin        Value: 203.0.113.10
Type: A   Host: restaurant   Value: 203.0.113.10
Type: A   Host: order        Value: 203.0.113.10
Type: A   Host: www          Value: 203.0.113.10

Then get free Let's Encrypt certificates with Certbot:

# Nginx
sudo apt install certbot python3-certbot-nginx
sudo certbot --nginx -d admin.yourdomain.com -d restaurant.yourdomain.com -d order.yourdomain.com -d www.yourdomain.com

# Apache
sudo apt install certbot python3-certbot-apache
sudo certbot --apache -d admin.yourdomain.com

Certbot renews them by itself. Check with sudo certbot renew --dry-run.

A complete Nginx site with the HTTP → HTTPS redirect looks like this:

server {
    listen 80;
    server_name admin.yourdomain.com;
    return 301 https://$host$request_uri;
}
server {
    listen 443 ssl;
    server_name admin.yourdomain.com;
    ssl_certificate     /etc/letsencrypt/live/admin.yourdomain.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/admin.yourdomain.com/privkey.pem;
    root /var/www/yourbrand-admin;
    index index.html;
    location / {
        try_files $uri $uri/ /index.html;
    }
}

1. Domains → Create A New Domain (or Subdomains), for example admin.yourdomain.com.
2. Set its Document Root to the folder you upload to, and upload the contents of build/web/ plus the .htaccess (Deploy the websites).
3. Security → SSL/TLS Status, select the domain and click Run AutoSSL. A free certificate is issued and renews by itself.