Added linting to .gitlab-ci.yml

.gitlab-ci.yml

@@ -1,13 +1,27 @@
 variables:
   GIT_SUBMODULE_STRATEGY: recursive
 
-image:
-  name: klakegg/hugo:0.55.6-ext-alpine
-  entrypoint:
-    - /bin/sh
-    - "-c"
-
+lint:
+  image: 
+    name: docker/compose:1.24.1
+    entrypoint:
+      - /bin/sh
+      - "-c"
+  services:
+    - docker:dind
+  variables:
+    DOCKER_HOST: "tcp://docker:2375/"
+    DOCKER_DRIVER: overlay2
+  script:
+    - docker-compose run xo-js-lint
+    - docker-compose run xo-html-lint
+    - docker-compose run sass-lint
 build:
+  image:
+    name: klakegg/hugo:0.55.6-ext-alpine
+    entrypoint:
+      - /bin/sh
+      - "-c"
   script:
     - hugo --minify
   artifacts:
@@ -18,6 +32,11 @@ build:
     - master
 
 test:
+  image:
+    name: klakegg/hugo:0.55.6-ext-alpine
+    entrypoint:
+      - /bin/sh
+      - "-c"
   script:
     - hugo_output=$(hugo --path-warnings --i18n-warnings)
     - echo "$hugo_output"