docs: generate docs and publish them on gitlab pages

Closes #38

.gitlab-ci.yml

@@ -4,6 +4,7 @@ stages:
   - setup
   - build
   - test
+  - docs
 
 setup:
   image: registry.gitlab.com/openstapps/projectmanagement/builder
@@ -31,8 +32,6 @@ build:
     paths:
       - node_modules
       - www
-  tags:
-    - docker
 
 unit:
   stage: test
@@ -41,19 +40,24 @@ unit:
   artifacts:
     paths:
     - coverage
-  tags:
-    - docker
 
 e2e:
   stage: test
   script:
     - npm run e2e
-  tags:
-    - docker
 
 audit:
   stage: test
   script:
     - npm audit
-  tags:
-    - docker
+
+pages:
+  stage: docs
+  script:
+    - npm run documentation
+    - mv docs public
+  only:
+    - master
+  artifacts:
+    paths:
+      - public