Reorganize CI

.gitlab-ci.yml

 variables:
   GIT_SUBMODULE_STRATEGY: recursive
 
-build docker image:
+stages:
+  - test
+  - build
+  - deploy
+
+zola check:
+  stage: test
+  image: alpine:latest
+  before_script:
+  - apk add --update-cache --repository http://dl-cdn.alpinelinux.org/alpine/edge/community/ zola
+  - apk add yarn
+  - yarn install
+  script:
+  - zola check
+
+docker build:
+  stage: build
   interruptible: true
   image:
     name: gcr.io/kaniko-project/executor:debug
@@ -14,16 +30,3 @@ build docker image:
        --destination $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME
        --cache=true
        --cleanup
-
-build pages:
-  image: alpine:latest
-  before_script:
-  - apk add --update-cache --repository http://dl-cdn.alpinelinux.org/alpine/edge/community/ zola
-  - apk add yarn
-  - yarn install
-  script:
-  - zola build
-  - cp _redirects public/
-  artifacts:
-    paths:
-    - public/