Merge branch 'add-staging-ressources-file' into 'develop'

Update CI for kubernetes staging, add staging-resources file

See merge request ldc-web/shared-ci!7

deploy/kubernetes.yml

@@ -60,6 +60,9 @@ kubernetes:staging:
         - job: docker-build:staging
     rules:
         - if: $CI_COMMIT_BRANCH == "trunk"
+    script:
+        - envsubst < manifest.yaml | kubectl apply --namespace ${KUBE_NAMESPACE} -f -
+        - envsubst < staging-resources.yaml | kubectl apply --namespace ${KUBE_NAMESPACE} -f -
     when: manual
     environment:
         name: staging