Add configuration for S3 ingestion in docker stack

docker/config.yml

@@ -52,3 +52,11 @@ solr:
 ponos:
   default_env:
     ARKINDEX_API_URL: https://ark.localhost/api/v1/
+
+ingest:
+  access_key_id: minio1234
+  secret_access_key: minio1234
+  endpoint: https://minio.ark.localhost
+  region: local
+  imageserver_id: 67890
+  prefix_by_bucket_name: false