Create a better description of the repo

[matejak]

Document what is this repo about, and how to check out that it all works.

[hancar]

ChatGPT suggests (and I like it):

Suggested change

	- `build` folder: Contains data needed to build some of the container images.
	- `data` folder: Contains persistent data used by the respective containers. The actual data is not part of the repository.
	- `build` folder: Contains files used to build custom container images.
	- `data` folder: Contains persistent data for containers (not tracked in the repository).

[hancar]

Please explain why that is. I couldn't find any evidence that Rocket.Chat "doesn't recognize admin user". On the contrary, the Rocket.Chat documentation uses that value. So, is using a different admin username for Rocket.Chat just our preference? Why?

[matejak]

It is about the acutal value of the username - at least at some point, admin was blacklisted. I am not able to find this documented anywhere. It is easy to verify though, so I will conveniently leave it as an exercise for the reviewer :-)

[hancar]

I would suggest using a different style. Here, lines 55 and 56 are rendered by Markdown into a single line. Adding an empty line (making Available as http://localhost:1184 a separate paragraph) seems to take up too much vertical space in the source. Therefore, I suggest editing all sections this way:

-### Keycloak
+### Keycloak (http://localhost:1184)

-Available as http://localhost:1184
SSO server, connects to LDAP, and mainly uses SAML to provide SSO to the other various services.

[hancar]

I suggest to shorten the "you can use it ... using" formulation.
A suggestion by ChatGPT:

Suggested change

	You can use it to create a user (hopefully with admin privileges) using its CLI.
	Then, you should be able to log in using SAML.
	You can use its CLI to create a user (ideally with admin privileges), then log in via SAML.