feat(gitlab-ci): Add pages docs task

.gitlab-ci.yml

@@ -66,3 +66,24 @@ rust-nightly-clippy:
   <<: *rust_template
   script:
     - cargo clippy --all --verbose -- -D warnings
+
+pages:
+  stage: build
+  image: rustlang/rust:nightly
+  needs:
+    - rust-nightly
+  cache:
+    key: "$CI_COMMIT_REF_SLUG"
+    paths:
+      - cargo/
+      - target/
+    policy: pull
+  <<: *rust_template
+  script:
+    - cargo doc
+    - rm -rf public
+    - mkdir public
+    - cp -R target/doc/* public
+  artifacts:
+    paths:
+    - public
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