Today I Learned

1. Create a new file tls.yml

tls:
  stores:
    default:
      defaultCertificate:
        certFile: /etc/traefik/certs/your-domain.dev/cert.pem
        keyFile: /etc/traefik/certs/your-domain.dev/privkey.pem

2. Make sure you're copying this file in your Dockerfile

COPY .docker/traefik/conf.d/tls.yml /etc/traefik/tls.yml

3. Mount the certs folder in your docker-compose.yml file

volumes:
  ...
	- .docker/traefik/certs:/etc/traefik/certs
  ...

4. Update the traefik.yml config to support the file provider:

providers:
		...
    file:
      filename: "/etc/traefik/tls.yml
    ...