How to change the domain to a new one?

[radalysak]

Hello. I would like to thank you for the tutorial. It is excellent and detailed.

However, I am asking for advice. How can I change my domain? I currently have everything set up according to the instructions and "traefik" works fine for me, both from the internal and external network on the traefik.firstdomain.cz subdomain.

However, I bought a second domain to which I want to move everything, so traefik should work on the new subdomain traefik.seconddomain.cz. I changed everything in docker-compose.yml to the new subdomain. I gave the command "docker-compose up -d --force-recreate". I then entered my new subdomain for traefik in the browser and logged into the application from the internal network and everything works including a valid certificate for the new domain.

But I can no longer log into the application from an external network. On my mobile phone, I get the error code 522 that I should visit the cloudflare page, as well as the information that the browser is working, cloudflare is working and "host traefik.seconddomain.cz error".

Can you please advise what I need to set up so that traefik works for me with the new subdomain? I also tried uninstalling the container, deleting the traefik folder, deleting the "proxy" network and a new installation, but it still works the same with the new domain. I can log in from the internal network, but I can't log in from the external network.

The second, less necessary question. How do I add additional domains to the "traefik" application settings?

By this I mean that traefik will run on one subdomain traefik.domain.cz, but then I will have two wordpress applications on two different domains. If I studied the settings correctly, it should be enough to add the following lines below:
`- "traefik.http.routers.traefik-secure.tls.domains[1].main=wordpress_one.cz"

• "traefik.http.routers.traefik-secure.tls.domains[1].sans=*.wordpress_one.cz" - "traefik.http.routers.traefik-secure.tls.domains[2].main=wordpress_two.cz"
• "traefik.http.routers.traefik-secure.tls.domains[2].sans=*.wordpress_two.cz"`

Is it allright like this?

Thank you for your help.