fix: woodpecker install browser deps

.woodpecker.yml

@@ -1,14 +1,16 @@
 steps:
   - name: install-dependencies
     image: node:18
-    environment:
-      NODE_PATH: /var/jenkins_home/.npm/node_modules
-      NPM_CONFIG_CACHE: /var/jenkins_home/.npm
     commands:
       - npm ci --prefer-offline --no-audit
 
+  - name: install-playwright
+    image: node:18
+    commands:
+      - npx playwright install
+      - npx playwright install-deps # wichtig für CI
+
   - name: run-tests
     image: node:18
     commands:
-      - npx playwright install
-      - npx playwright test
+      - npx playwright test # läuft standardmäßig headless