docs: Warn about Codespaces

[rfay]

The Issue

We haven't had consistent success with Codespaces.

The discussion in Discord indicated not to remove it but rather to warn a bit.

[mandrasch]

Hey @rfay, thanks for mentioning my-ddev-lab.mandrasch.eu 👍

• https://my-ddev-lab.mandrasch.eu/tutorials/cloud/codespaces.html is outdated, I'd need some time to update it to reflect the latest changes. I can get back to you when I updated it.

• The most up to date issue is this one with a new "wait for docker" script, which did not work 100% yet as well unfortunately. the github team is looking into it Codespaces: "Cannot connect to the Docker daemon" occurs randomly (postCreateCommand) devcontainers/features#977

[rfay]

Thanks @mandrasch - Is this OK at this point though, good enough to say what's happening right now?

[mandrasch]

@rfay I added a suggestion

• I removed "It seems to change without warning" since this was a one-time thing with the codespaces official URL change, at least this is my current state of knowledge
• I linked to the recent issue with postCreateCommand - this is the best way to guide users imho :)

good to have a warning in the docs 👍