pin docker img versions

.gitlab-ci.yml

@@ -3,7 +3,7 @@ stages:
   - deploy
 
 convert:
-  image: python
+  image: python:3.9
   stage: convert
   rules:
     - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
@@ -18,7 +18,7 @@ convert:
 
 commit:
   image:
-    name: alpine/git:latest
+    name: alpine/git:v2.26.2
     entrypoint: [""]
   stage: deploy
   rules: