MINOR: fix broken top nav link in docker preview

[brandboat]

Add back rewrite rule to Dockerfile to fix broken top nav link in docker preview.

[brandboat]

before:

2025-09-02.10.53.31.mov

after:

2025-09-02.10.54.38.mov

[brandboat]

gentle ping @chia7712, @m1a2st, could you please take a look? The rewrite rule was removed in #665 and make top nav link broken. Thank you!

[m1a2st]

When I tested this branch, the zk2kraft.html page failed due to this policy.

[brandboat]

When I tested this branch, the zk2kraft.html page failed due to this policy.

@m1a2st, It looks like you followed the instructions in How to preview the latest documentation changes in Kafka repository?
, right? To work around the 404 error, try renaming the dev directory to 42 — that should help.

I think this is a separate issue. I’ve already checked out the asf-site branch, and the same problem still occurs.

That said, it might be worth updating the README.md. For example, the link shown in your video points to /{{version}}/documentation.html#upgrade_4_0_1, which should actually be /42/documentation.html#upgrade_4_0_1. The {{version}} comes from dev/js/templateData.js. Since the {{version}} placeholder isn’t being replaced properly, it results in a 404 error because the path doesn’t exist.

[m1a2st]

That said, it might be worth updating the README.md. For example, the link shown in your video points to /{{version}}/documentation.html#upgrade_4_0_1, which should actually be /42/documentation.html#upgrade_4_0_1. The {{version}} comes from dev/js/templateData.js. Since the {{version}} placeholder isn’t being replaced properly, it results in a 404 error because the path doesn’t exist.

Yes, I completely agree that we should update the README file. We can handle this in a separate PR.