[sysprof] .gitlab-ci.yml: add flatpak build to CI

[Christian Hergert <chergert src gnome org>]

commit 054ba9b64dbe65e2af7b15a319424be75586be80
Author: Christian Hergert <chergert redhat com>
Date:   Fri Jul 22 12:12:34 2022 -0700

    .gitlab-ci.yml: add flatpak build to CI

 .gitlab-ci.yml | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 00000000..c02089c5
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,20 @@
+include: 'https://gitlab.gnome.org/GNOME/citemplates/raw/master/flatpak/flatpak_ci_initiative.yml'
+
+flatpak:
+  extends: .flatpak
+  timeout: 60m
+  variables:
+    GIT_SUBMODULE_STRATEGY: normal
+
+    # Replace with your manifest path
+    MANIFEST_PATH: "org.gnome.Sysprof.Devel.json"
+    RUNTIME_REPO: "https://nightly.gnome.org/gnome-nightly.flatpakrepo";
+    # Replace with your application name, as written in the manifest
+    FLATPAK_MODULE: "sysprof"
+    APP_ID: "org.gnome.Sysprof.Devel"
+    BUNDLE: "sysprof-git.flatpak"
+
+nightly:
+  extends: '.publish_nightly'
+  needs:
+    - 'flatpak'