move everything to one stage

.gitlab-ci.yml

 image: node:24-alpine
 
 stages:
-  - install
-  - check
   - build
 
-install:
-  stage: install
+build:
+  stage: build
   script:
     - npm config set https-proxy http://webproxy.bs.ptb.de:8080
     - npm config set proxy http://webproxy.bs.ptb.de:8080
     - npm ci
+    - npm run check
+    - npm run build
   cache:
     paths:
       - node_modules/
-
-check:
-  stage: check
-  script:
-    - npm run check
-
-build:
-  stage: build
-  script:
-    - npm run build
   artifacts:
     when: on_success
     paths: