Merge branch 'ci_dev' into 'main'

Add CI/CD

See merge request !5

.gitlab-ci.yml

+stages:
+  - build
+  - deploy
+
+.build: &build
+  stage: build
+  script: 
+    - cd docs
+    - make html
+  artifacts:
+    paths:
+      - docs/build/html
+
+build:docker:
+  <<: *build
+  tags: 
+    - docker
+  image: sphinxdoc/sphinx
+  needs: [ ]
+
+.deploy: &deploy
+  stage: deploy
+  script:
+    - cp -rv docs/build/html/* ${DEPLOY_PATH}
+
+deploy:prod:
+  <<: *deploy
+  tags:
+    - caesarvm
+  only:
+    - main
+  needs: [ "build:docker" ]
+  variables: 
+    DEPLOY_PATH: "/app/wiki/docs/build/html"
+    GIT_STRATEGY: clone
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