Update .gitlab-ci.yml

.gitlab-ci.yml

@@ -62,23 +62,20 @@ documentation:pdf:
     - documentation/design/documentation.pdf
 
 .mdbook_common: &rust
-  before_script:
-      - cargo install mdbook
   image: 
-    name: rust:latest
+    name: $CI_REGISTRY/danet/internetworking/mdbook:latest
+    entrypoint:
+      - ''
   stage: documentation
   script:
     - mdbook build documentation --dest-dir public
-  cache:
-    paths:
-    - /root/.cargo/
   
 documentation:static:
   rules:
     - if: '$CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH'
   artifacts:
     paths:
-      - documentation/public
+      - public
     expire_in: 1 week
   <<: *rust