Optimized cache for CI

.gitlab-ci.yml

@@ -5,8 +5,8 @@ stages:
     - build
     - package
 
-cache:
-    - key:
+cache: &global_cache
+    key:
         files:
             - yarn.lock
             - frontend/yarn.lock
@@ -15,6 +15,7 @@ cache:
         - node_modules
         - frontend/.yarn
         - frontend/node_modules
+    policy: pull
 
 before_script:
     - yarn install --cache-folder .yarn --frozen-lockfile
@@ -23,11 +24,17 @@ before_script:
     - cd ..
 
 test_backend:
+    cache:
+        <<: *global_cache
+        policy: pull-push
     stage: test
     script:
         - yarn lint
 
 test_frontend:
+    cache:
+        <<: *global_cache
+        policy: pull-push
     stage: test
     script:
         - cd frontend