Add GitLab Pages config for mdbook

.gitlab-ci.yml

@@ -0,0 +1,21 @@
+stages:
+    - deploy
+
+pages:
+  stage: deploy
+  image: rust:latest
+  variables:
+    CARGO_HOME: $CI_PROJECT_DIR/cargo
+  before_script:
+    - export PATH="$PATH:$CARGO_HOME/bin"
+    - mdbook --version || cargo install --debug mdbook
+  script:
+        - mdbook build -d public
+  only:
+      - master 
+  artifacts:
+      paths:
+          - public
+  cache:
+    paths:
+    - $CARGO_HOME/bin