Added node_modules cache to CI

.gitlab-ci.yml

@@ -5,17 +5,32 @@ stages:
     - build
     - package
 
+cache:
+    - key:
+          files:
+              - package-lock.json
+      paths:
+          - node_modules
+    - key:
+          files:
+              - frontend/package-lock.json
+      paths:
+          - frontend/node_modules
+
+before_script:
+    - npm ci
+    - cd frontend
+    - npm ci
+
 test_backend:
     stage: test
     script:
-        - npm ci
         - npm run lint
 
 test_frontend:
     stage: test
     script:
         - cd frontend
-        - npm ci
         - npm run lint
 
 build_backend:
@@ -24,7 +39,6 @@ build_backend:
         - job: test_backend
           artifacts: false
     script:
-        - npm ci
         - npm webpack
     artifacts:
         paths:
@@ -38,7 +52,6 @@ build_frontend:
           artifacts: false
     script:
         - cd frontend
-        - npm ci
         - npm run lint
     artifacts:
         paths:
@@ -47,6 +60,7 @@ build_frontend:
 
 package_server:
     stage: package
+    cache: []
     needs:
         - job: build_backend
           artifacts: true