[gimp-web] themes: update development downloads page for Linux/Flatpak.

[Jehan <jehanp src gnome org>]

commit 385e0314a0a38c3cde4c3ea5203a6c27b6f5d149
Author: Jehan <jehan girinstud io>
Date:   Mon Nov 2 13:30:36 2020 +0100

    themes: update development downloads page for Linux/Flatpak.

 .../newgimp/templates/downloads-development.html   | 49 ++++++++++++++++++++--
 1 file changed, 45 insertions(+), 4 deletions(-)
---
diff --git a/themes/newgimp/templates/downloads-development.html 
b/themes/newgimp/templates/downloads-development.html
index d46230ba..f2ddb7b1 100644
--- a/themes/newgimp/templates/downloads-development.html
+++ b/themes/newgimp/templates/downloads-development.html
@@ -57,6 +57,47 @@
     <div id='linux' class="os linux" markdown='1'>
         <h2>GIMP (development version) for Unix-like systems</h2>
 
+        <p>We provide a Flatpak development repository on Flathub. This
+        is not a nightly, hence only development releases will be made
+        available (i.e. specific snapshot manually selected, not
+        automatic builds). If there are no development releases, the
+        latest stable release will be provided instead in this
+        repository.</p>
+        <p>Install with following command lines:
+        <p>
+        <code>
+          flatpak remote-add --user flathub-beta https://flathub.org/beta-repo/flathub-beta.flatpakrepo
+          flatpak install --user flathub-beta org.gimp.GIMP
+        </code>
+        </p>
+        <p>
+        Run with following command line:
+        </p>
+        <p>
+        <code>flatpak run org.gimp.GIMP//beta</code>
+        </p>
+        <p>
+        To update:
+        </p>
+        <p>
+        <code>flatpak update</code>
+        </p>
+        <p>
+        <em>Note: If you installed both the stable and beta
+        repositories, the desktop (menus, etc.) will see only one
+        version at a time.
+        To select which version your desktop should see, run one of
+        these commands for respectively either the stable or the beta
+        version:</em>
+        </p>
+        <p>
+        <code>
+          flatpak make-current --user org.gimp.GIMP stable
+          flatpak make-current --user org.gimp.GIMP beta
+        </code>
+        </p>
+
+<!--
 {% if FLATPAK_FILE_DEVELOPMENT is defined %}
 
         {% if FLATPAK_VER_DEVELOPMENT != GIMP_VERSION_DEVELOPMENT %}
@@ -109,11 +150,11 @@
         <p>There is no flatpak package yet, sorry. Please check back later.</p>
 
 {% endif %}
-
-        <p>It's very likely your Unix-like system such as a GNU/Linux distribution already comes with a GIMP 
package. It may be a preferred method of installing GIMP, as the distribution maintainers take care of all 
the dependencies and bug fix updates. Please note that many distros decide to pin a specific version of GIMP 
to their releases.</p>
-
+-->
         <p>
-            GIMP can also run on Solaris and is available for the BSD family of systems such as FreeBSD and 
OpenBSD.
+            GIMP can also run on Solaris and is available for the BSD
+            family of systems such as FreeBSD and OpenBSD. Third party
+            development packages may be available for these systems.
             Please refer to the documentation for your Unix-like system on the installation of software.
         </p>