Update documentation Running Kiwi TCMS as a Docker container to include use cases for http->https redirect when using custom host ports that are not 443

[gudrutis]

Is your feature request related to a problem? Please describe.
When following the tutorial to setup KiwiTCMS using docker (described at docs/source/installing_docker.rst), I ran into an issue that I could not easily configure nginx to redirect to a different https port. As of the latest version per my understanding, there is no way to disable http->https redirect. If on a host machine, I will mount https port on a different port than 443 ( ex. the port is already taken), the http->https redirect does not know about it and sends to default https port on a host server which is still 443.

In other words, when using custom ports that are not 80 and 443, http->https redirect breaks, this situation is not documented and I had to come up with my own solution

Describe the solution you'd like
This is what I did:

• Created a copy of etc/nginx.conf as etc/nginx.conf.overwrite
• here

  Kiwi/etc/nginx.conf

  Line 74 in 3867592

  return 301 https://$host$request_uri;

  included port like this return 301 https://$host:2443$request_uri;
• in

  Kiwi/docker-compose.yml

  Line 28 in 3867592

  volumes:

  added line - ./etc/nginx.conf.overwrite:/Kiwi/etc/nginx.conf to overwrite nginx configuration with a new one.

Describe alternatives you've considered
Building a docker image from scratch would be overkill in such a situation, in my opinion.

Additional context
I am attaching screenshots to better understand what I did.