ci: adjust jobs to match configuration

.gitlab-ci.yml

@@ -5,6 +5,9 @@ cache:
   paths:
     - node_modules
 
+before_script:
+  - npm install
+
 stages:
   - build
   - test
@@ -13,7 +16,6 @@ stages:
 build:
   stage: build
   script:
-    - npm install
     - npm run build
   artifacts:
     paths:
@@ -38,23 +40,22 @@ scheduled-audit:
 mocha:
   stage: test
   script:
-    - npm install
     - npm test
 
 pages:
   stage: deploy
   script:
-    - npm install
     - npm run documentation
     - mv docs public
-  only:
-    - master
   artifacts:
     paths:
       - public
+  only:
+    - /^v[0-9]+\.[0-9]+\.[0-9]+$/
 
 docker:
   image: registry.gitlab.com/openstapps/projectmanagement/builder:latest
+  before_script: []
   dependencies:
     - build
   stage: deploy