ci: Use ci-fairy to check for Signed-off-by

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>

.gitlab-ci.yml

@@ -1,10 +1,15 @@
+.templates_sha: &template_sha 290b79e0e78eab67a83766f4e9691be554fc4afd
 
 include:
   - project: 'freedesktop/ci-templates'
-    ref: 59de540b620c45739871d1a073d76d5521989d11
+    ref: *template_sha
     file: '/templates/debian.yml'
+  - project: 'freedesktop/ci-templates'
+    ref: *template_sha
+    file: '/templates/ci-fairy.yml'
 
 stages:
+  - review
   - containers-build
   - test
 
@@ -15,6 +20,18 @@ stages:
     FDO_DISTRIBUTION_PACKAGES: 'build-essential automake autoconf libtool pkg-config libwayland-dev meson'
     FDO_DISTRIBUTION_TAG: '2021-03-24.0'
 
+check-commit:
+  extends:
+    - .fdo.ci-fairy
+  stage: review
+  script:
+    - ci-fairy check-commits --signed-off-by --junit-xml=results.xml
+  variables:
+    GIT_DEPTH: 100
+  artifacts:
+    reports:
+      junit: results.xml
+
 container_build:
   extends:
     - .debian