What specifically is not true from my post? First I asked some questions and they were not rhetorical questions. Did you actually look at those tutorials? Do you understand how Docker container work?
And yes it is absolutely true that you have to have at least a basic understanding of the technologies you are working with in order to be successful with openHAB. If you are going to use a less common configuration such as running openHAB on Docker it’s even more important to have that understanding.
Nowhere have you made any indication that you have even read those tutorials and given them a try. If you had you would have learned that indeed, those tutorials do work with Docker once you have speedtest installed in the container. It’s all done through the Exec binding.
Or, if you did try and it didn’t work for you, you’ve provided zero details about what you have actually tried to do and what the problem might be. From our perspective you want us to just tell you how to do it. But there are already two great and thorough posts sihui provided that do just that so why do we have to take the time to write it up yet again here?
There are two conventions many/most of the helpers on this forum follow:
If you don’t tell us we have no choice but to assume you’ve not even tired.
If you’ve not even tried, we’re not going to do it for you.
You may have spent hours look at something and trying things out but there is no evidence of that here. From my perspective all I see is a refusal to even go and look at the tutorials until someone here tells you to. And then what happens at the next tutorial? Do we have to tell you that it applies to Docker too? And the next and the next?