[gimp-web] Add thank you first page

[Jehan <jehanp src gnome org>]

commit feed3a602d445691064d2de34ffa87243aa154b2
Author: nmat <nmat users noreply github com>
Date:   Sun Oct 31 09:34:29 2021 +0100

    Add thank you first page

 content/downloads/thanks.md | 49 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
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diff --git a/content/downloads/thanks.md b/content/downloads/thanks.md
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+Title: Thank you for downloading GIMP
+Date: 2021-07-17T14:18:56-05:00
+Author: nmat
+Status: hidden
+
+Check out the [tutorials](/tutorials/) or [documentation](/docs/) to learn more.
+
+Did you know that GIMP is built with love _entirely by volunteers_ whose spare time is spent hacking at the 
code, writing documentation, and creating tutorials?
+
+**Please consider helping us to build a better GIMP for everyone!**
+
+
+## Donate
+
+<a href="https://www.gimp.org/donating/";>
+<span class='donate-button'>
+Support us by<br/>
+<strong>Donating</strong>
+</span>
+</a>
+
+Donations help us to sustain the project by supporting developers and required hardware and infrastructure.
+Every little bit helps and is a wonderful way to show some love for the project!
+
+
+
+## Contribute
+
+<a href="https://www.gimp.org/develop/";>
+<span class='donate-button'>
+Help with<br/>
+<strong>GIMP development</strong>
+</span>
+</a>
+
+You don't have to be a developer to contribute to the project (although new developers are highly encouraged 
to join us)!
+
+There are many ways to help the project including:
+
+ * Writing [documentation](https://docs.gimp.org/)
+ * Creating [tutorials](/tutorials)
+ * [Bug triaging](https://gitlab.gnome.org/GNOME/gimp/-/issues)
+ * Feature testing
+ * Translating GIMP and documentation
+ * Create cool things (and tell people about it)
+
+Even simply talking about GIMP and amplifying posts/social interactions goes a long way to helping raise 
awareness of the project.
+
+Find out [more about getting involved!](/develop/)