Integrated: add README.md

[Andrei Rybak]

On Sun, 13 Aug 2023 11:15:35 GMT, Andrei Rybak <duke at openjdk.org> wrote:

> Add a README.md file in Markdown format with a link to the project on openjdk.org and with a banner of welcome.jpg file.  README.md is nicely formatted by repository browsers like [GitHub][1] on the landing page of the repository.
>     
> [1]: https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-readmes
> 
> ----
> 
> How the file is rendered can be seen on GitHub: https://github.com/openjdk/duke/blob/1d68763c12afac7f5a3b15f02937afe567d0256a/README.md

This pull request has now been integrated.

Changeset: eacfa3a4
Author:    Andrei Rybak <rybak.a.v at gmail.com>
Committer: Jeff Dinkins <jeff at openjdk.org>
URL:       https://git.openjdk.org/duke/commit/eacfa3a4ee49a5f1810238e8adb15430bf42688a
Stats:     3 lines in 1 file changed: 3 ins; 0 del; 0 mod

add README.md

Add a README.md file in Markdown format with a link to the project on
openjdk.org and with a banner of welcome.jpg file.  README.md is nicely
rendered by repository browsers like GitHub [1] on the landing page of
the repository.

[1] https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-readmes

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PR: https://git.openjdk.org/duke/pull/2