HA Docker Remote Acces

I’m trying to access HA from outside my network. Steps I’ve already taken:
1. I installed HA (0.108.6) on my mac using docker
2. I created a duckDNS account where I got my domain and token
3. I added the following to my settings:

     base_url: MYDOMAIN.duckdns.org:8123
     ssl_certificate: /ssl/fullchain.pem
     ssl_key: /ssl/privkey.pem
4. I opened port 8123:8123 on my router.

I try to open MYDOMAIN.duckdns.org but nothing works.

Any suggestions?