[📑 Docs]: document adding variables to URL

[quetzalliwrites]

What Dev Docs changes are you proposing?

As part of Google Season of Docs 2023 at AsyncAPI, we're going to write in-depth explanations of the different sections of an AsyncAPI document to avoid difficulties in implementing EDAs.

This task is part of the Docs EPIC: #1507.

For this issue, we'll cover:

• Adding variables to URL - Explain how to add variables to the server URL when parts of the URL may be different per runtime. Explain how these can be reused between two servers via components.serverVariables.

Code of Conduct

• I agree to follow this project's Code of Conduct

[vintage-creator]

I' would like to work on this issue. Please kindly assign this task to me. Thank you.

[quetzalliwrites]

@kakabisht assigned

[quetzalliwrites]

@vintage-creator Unfortunately, this is a GSoD issue for GSoD writers, so you cannot pick this up. Feel free to work on a regular docs issue or suggest an improvement yourself in a new docs issue :)

[smoya]

I suggest we clarify in the description of this issue that this doc should be based on AsyncAPI Spec version 3.

[TRohit20]

The issue in context is now resolved as PR #2415(merged) adds the document intended to the AsyncAPI website. Hence, closing the issue.