gitlab-ci: add buster test and move doc and pages build

Signed-off-by: Ivo De Decker <ivodd@debian.org>

.gitlab-ci.yml

@@ -6,6 +6,18 @@ tests-stretch:
     - apt-get install -y python3 python3-apt python3-yaml python3-pycodestyle python3-pytest git rsync libclass-accessor-perl libdpkg-perl libyaml-syck-perl
     - ci/gitlab-ci-runner
 
+tests-buster:
+  stage: test
+  image: debian:buster
+  script:
+    - apt-get update
+    - apt-get install -y python3 python3-apt python3-yaml python3-coverage python3-pycodestyle pycodestyle python3-pytest python3-pytest-cov git rsync libclass-accessor-perl libdpkg-perl libyaml-syck-perl
+    - ci/gitlab-ci-runner --with-coverage
+  artifacts:
+    paths:
+     - coverage
+     - codestyle
+
 tests-sid:
   stage: test
   image: debian:sid
@@ -20,7 +32,7 @@ tests-sid:
 
 docs:
   stage: test
-  image: debian:sid
+  image: debian:buster
   script:
     - apt-get update
     - apt-get install -y python3-sphinx
@@ -34,7 +46,7 @@ pages:
   stage: deploy
   dependencies:
     - docs
-    - tests-sid
+    - tests-buster
   script:
     - rm -fr public
     - mkdir public