Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -15,12 +15,12 @@
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 # === Configure pipeline ===
-image: alpine:latest
 stages:
   - build
   - deploy
 
 doxygen:
+  image: alpine:latest
   stage: build
   tags:
     - documentation
@@ -39,6 +39,7 @@ doxygen:
       when: manual
 
 pages:
+  image: python:latest
   stage: deploy
   tags:
     - documentation