Added new documentation page to show users how to export a HAR file

[ProgrammerAL]

• Created a new page to show users how to export a HAR file
• It's in the Troubleshooting section, which is different from https://github.com/DuendeSoftware/customer-success/issues/430 suggesting we use Diagnostics section. I thought Troubleshooting would be better, but we can move it to Diagnostics if we decide that's better.

[Copilot]

Pull request overview

This PR adds comprehensive documentation for exporting HAR (HTTP Archive) files, a critical troubleshooting tool for diagnosing network-related issues. The documentation guides users through the process of generating HAR files across multiple browsers and includes important security considerations.

Changes:

• Created new documentation page explaining HAR files and their use in diagnostics
• Added browser-specific instructions for Chrome, Safari, Firefox, and Microsoft Edge
• Included guidance on handling sensitive data and sanitizing HAR files

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[khalidabuhakmeh]

Could you add a section telling Duende IdentityServer customers some common scenarios that HAR helps resolve? This might be something @AndersAbel and @wcabus can give some background on.

[maartenba]

Couple of small suggestions for your consideration

[wcabus]

Could you add a section telling Duende IdentityServer customers some common scenarios that HAR helps resolve? This might be something @AndersAbel and @wcabus can give some background on.

One particular one would be cookies not flowing to BFF/IdentityServer when they have incorrect SameSite settings. Which immediately is a good use case of including cookies but removing their sensitive data, although most browsers will automatically remove all cookie information when exporting a HAR file by default.

The most recent example where a HAR file helps, is to see the flow between the client application, Duende IdentityServer and external IdPs when these are involved.

[ProgrammerAL]

Updated the PR. Got in the formatting suggestions everyone mentioned. Reworded the caution tip at the top. Added the suggested section at the top "When To Use A HAR File". Also decided to add a new section towards the bottom, "Viewing A HAR File"

[khalidabuhakmeh]

Looks better.

[maartenba]

Agreed, looking good. Feel free to merge at will!