Node documentation.

### Did you read the documentation and guides?

- [X] I have inspected the documentation.

### Is there an existing issue?

- [X] I have searched the existing issues.

### Description of the problem

Aleph node needed to have documentation on details around docker deployment. If proper documentation exists, everyone can deploy according to their needs and have a better experience in general through updates and everything since if they add some extra flag, they would know why they added it.

At the current state, script changes some files, mostly that's pulling chainspec file and rarely making other adjustments. There are more reliable ways to do this than script. Not to mention one of our servers 10.2 not recognized as an update, so the script updated the directory but kept pulling 10.1 instead of 10.2. Anyone could miss that and assume it's updated. This is problematic, considering the network might have problems and a fast response is required. Typically something like docker run aleph 10.1 --some flags command or directly latest tag here on docker-compose. We use the script, and when issues like this happen, we need to go through the script's code see what exactly sends as a command to fix the problem etc. If documentation exists, everyone can do their deployment and streamline their deployment process without relying on an unreliable scrip that could fail for various reasons.

### Information on your setup.

While issue is with script I open this issue to make script a secondary option for docker deployments.

### Steps to reproduce

_No response_

### Did you attach relevant logs?

- [X] I have attached logs (if relevant).