[console] ci: Add flatpak build test

[Zander Brown <zbrown src gnome org>]

commit f0971624611cdc4d21ab3a132e946698f3577df1
Author: Ungedummt <ungedummt gmx de>
Date:   Sun Dec 19 18:11:53 2021 +0100

    ci: Add flatpak build test

 .gitlab-ci.yml | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e6ffb3b..fd11e0e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,3 +1,5 @@
+include: 'https://gitlab.gnome.org/GNOME/citemplates/raw/master/flatpak/flatpak_ci_initiative.yml'
+
 debian:
   image: debian:testing
   stage: build
@@ -24,3 +26,15 @@ fedora:
     - meson --buildtype=release -Dtests=true _build .
     - meson compile -C _build
     - meson test -C _build
+
+flatpak:
+    image: 'registry.gitlab.gnome.org/gnome/gnome-runtime-images/gnome:master'
+    stage: build
+    variables:
+        MANIFEST_PATH: "build-aux/flatpak/org.gnome.Console.Devel.json"
+        FLATPAK_MODULE: "gnome-console"
+        RUNTIME_REPO: "https://nightly.gnome.org/gnome-nightly.flatpakrepo";
+        GIT_SUBMODULE_STRATEGY: recursive
+        APP_ID: "org.gnome.Console.Devel"
+        BUNDLE: "org.gnome.Console.Devel.flatpak"
+    extends: .flatpak