fix config error

helm-charts/helm-values/records.yml

 deploymentName: documents-search-doc
 outputTopic: search-doc-output-documents
-inputTopic: fedora-output-json-records
+inputTopic: fedora-output-json-records
\ No newline at end of file
+
+mediaServerUrl: https://media.memobase.k8s.unibas.ch/memo/
\ No newline at end of file

src/main/resources/app.yml

 app:
   media:
-    url: ${MEDIA_SERVER_URL?:system}
+    url: ${MEDIA_SERVER_URL:?system}
 kafka:
   streams:
     bootstrap.servers: ${KAFKA_BOOTSTRAP_SERVERS:?system}