docs: address issue #23308

[github-actions]

Summary

Added documentation for DOCKER_HOST requirement when using Docker SDKs with Docker Desktop for Linux.

Changes

• Added "Using Docker SDKs with Docker Desktop" section to Linux install docs explaining why SDKs need DOCKER_HOST set and providing configuration commands
• Added FAQ entry "How do I use Docker SDKs with Docker Desktop for Linux?" with troubleshooting steps
• Added note in SDK reference docs alerting Docker Desktop for Linux users to set DOCKER_HOST before using SDKs

Fixes #23308

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[dvdksn]

@aevesdocker can you please help review this?

[aevesdocker]

@dvdksn Can I get some help please?
I've checked out this PR and made some edits (with gh pr checkout <id>), but can't seem to push the changes to this branch like I'm normally able to (with git push). Getting an access rights error message.
Is there a setting that needs to change with the agent PRs?

[dvdksn]

@aevesdocker what error are you getting exactly?
Are you able to push with:

git push origin HEAD:refs/heads/agent/issue-23308

[aevesdocker]

If I do git push I get:

fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

git push origin HEAD:refs/heads/agent/issue-23308

did something where I'm now able to create a PR in my fork of the docs repo

[aevesdocker]

I notice this PR is missing this setting

[dvdksn]

ahh right origin would be your fork :-) sorry, you can delete that branch if you want.

have you perhaps configured upstream as "no_push":

upstream  git@github.com:docker/docs.git (fetch)
upstream  no_push (push)

you can change the push url with: git remote set-url --push upstream git@github.com:docker/docs.git

or if you use http urls and not ssh: git remote set-url --push upstream https://github.com/docker/docs.git

then I believe git push might work

or alternatively this might work as a one-off if you don't want to change the remote url:

git push https://github.com/docker/docs.git HEAD:agent/issue-23308

[aevesdocker]

changed the push url, thanks @dvdksn!