Custom Domains & SSL

Add your own domain to your App Platform application. SSL certificates are provisioned automatically via Let's Encrypt.

Adding a Domain

1. Go to Services > PaaS > Your App > Domains
2. Click Add Domain
3. Enter your domain (e.g., myapp.example.com)

DNS Configuration

Point your domain to the App Platform with a CNAME record:

For apex domains (e.g., example.com without subdomain):

• Some DNS providers support CNAME flattening (Cloudflare, Route53)
• Otherwise, use an A record pointing to the platform IP (contact support)

SSL Certificates

After DNS is pointed correctly:

1. SSL certificate is automatically issued via Let's Encrypt
2. Certificate auto-renews before expiry
3. HTTP is automatically redirected to HTTPS
4. No manual configuration needed

Multiple Domains

You can add multiple domains to a single app:

• myapp.example.com
• www.example.com
• api.example.com

Each domain gets its own SSL certificate automatically.

DNS Propagation

After changing DNS records:

• TTL-based propagation: typically 5 minutes to 48 hours
• Check propagation: whatsmydns.net
• SSL provisioning starts after DNS propagation completes

Troubleshooting