use node:alpine, but cache node modules [skip-ci]

.gitlab-ci.yml

@@ -17,16 +17,25 @@ stages:
 ########
 # BUILD
 #################################################################
-
-#build_fe:
-#  image: node:alpine
-#  script:
-#    - echo ''
-#  extends:
-#    - .build
 .build:
   stage: build
 
+build_fe:
+  image: node:alpine
+  script:
+    - cd ./frontend
+    - npm install
+  cache:
+    key: $CI_COMMIT_REF_SLUG-$CI_PROJECT_DIR
+    paths:
+      - node_modules/
+  only:
+    changes:
+      - package-lock.json
+  extends:
+    - .build
+
+
 build_be:
   before_script:
     - apt-get update
@@ -56,8 +65,16 @@ lint_fe:
   extends:
     - .lint
     - .angular-image
-#  needs:
-#    - build_fe
+  cache:
+    key: $CI_COMMIT_REF_SLUG-$CI_PROJECT_DIR
+    paths:
+      - node_modules/
+    policy: pull-push
+  only:
+    changes:
+      - package-lock.json
+  needs:
+    - build_fe
 
 #lint_be:
 #  script:
@@ -78,6 +95,11 @@ test_fe:
     - cd ./frontend
     - npm update
     - ng test
+  cache:
+    key: $CI_COMMIT_REF_SLUG-$CI_PROJECT_DIR
+    paths:
+      - node_modules/
+    policy: pull
   extends:
     - .test
     - .angular-image