also add plug on the download page

Signed-off-by: Leah Rowe <info@minifree.org>

site/download.md

@@ -11,6 +11,17 @@ Git repositories. The page on [/docs/maintain/](docs/maintain/) describes how
 Libreboot is put together, and how to maintain it. If you wish to build
 Libreboot from source, [read this page](docs/build/).
 
+Buy Libreboot pre-installed
+-----------------
+
+If you want professional installation, Minifree Ltd sells [Libreboot
+pre-installed](https://minifree.org/) on select hardware, and it also provides
+a [Libreboot preinstall service](https://minifree.org/product/installation-service/)
+if you want to send your machine in to have Libreboot installed for you.
+
+Leah Rowe, the founder and lead developer of Libreboot, also owns and
+operates Minifree Ltd; sales provide funding for the Libreboot project.
+
 Safety warning
 --------------
 

site/download.uk.md

@@ -11,6 +11,17 @@ x-toc-enable: true
 Libreboot складається разом, і як підтримувати його. Якщо ви бажаєте зібрати
 Libreboot із джерельного кода, [прочитайте цю сторінку](docs/build/).
 
+Buy Libreboot pre-installed
+--------------
+
+If you want professional installation, Minifree Ltd sells [Libreboot
+pre-installed](https://minifree.org/) on select hardware, and it also provides
+a [Libreboot preinstall service](https://minifree.org/product/installation-service/)
+if you want to send your machine in to have Libreboot installed for you.
+
+Leah Rowe, the founder and lead developer of Libreboot, also owns and
+operates Minifree Ltd; sales provide funding for the Libreboot project.
+
 Safety warning
 --------------