ci: publish image after build and tests

.gitlab-ci.yml

@@ -11,15 +11,28 @@ stages:
   - test
   - deploy
 
-build:
+build:build:
   stage: build
   script:
     - npm install
     - npm run build
 
-build:image:
+test:audit:
+  stage: test
+  script:
+    - npm audit
+
+test:mocha:
+  stage: test
+  script:
+    - npm test
+
+publish:image:
   image: docker:stable
-  stage: build
+  dependencies:
+    - build
+    - test
+  stage: publish
   variables:
     DOCKER_DRIVER: overlay2
   services:
@@ -35,17 +48,7 @@ build:image:
   only:
     - /^v[0-9]+\.[0-9]+\.[0-9]+$/
 
-audit:
-  stage: test
-  script:
-    - npm audit
-
-mocha:
-  stage: test
-  script:
-    - npm test
-
-pages:
+deploy:pages:
   stage: deploy
   script:
     - npm run documentation