Add pic to hts newspost

Add picture + conference contributions to Use Case post on HTS.

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_posts/2021/06/2021-06-07-use-case-hts.md

@@ -28,9 +28,19 @@ by the end of 2020.
 The ubiquitous Apache webserver httpd was chosen as an endpoint due to it's modular design and familiarity for many IT administrators. The endpoint can be deployed easily and equipped with backend storage of the administrator's choice.
 The configuration of the Apache enables it to interface with FTS3.
 
+{:.treat-as-figure}
+![HTS schematic diagram]({% link assets/img/posts/2021-06-07-use-case-hts/FTS_sketch.svg %})
+
+
+#### Transfer performance
+
 First tests of HTS showed that transfers between connected centres are very feasible and the systems interoperate seamlessly with the Helmholtz AAI. 
 The transfers could be executed with a bandwidth of 80 - 120 MB/s, thus making it possible to transfer 1 TB worth of data in less than four hours without the need for further user interaction.
 
+For more information on HTS performance, you may also refer to the presentations given in recent
+[**ISGC**](https://indico4.twgrid.org/indico/event/14/session/10/contribution/46) and
+[**EGI**](https://indico.egi.eu/event/5000/contributions/14383/) conferences.
+
 #### HTS for Helmholtz AI
 
 Colleagues from the
@@ -46,7 +56,7 @@ Simply enter the URLs of both endpoints, select the files you want to transfer a
 You can then monitor your jobs under "My jobs" and see when they are completed.
 We will also supply a small video demonstration for using HTS with webFTS in the very near future.
 
-Technical instructions for setting up an endpoint for HTS can be found [here in our Technical Documentation](https://hifis.net/doc/core-services/fts-endpoint/).
+Technical instructions for setting up an endpoint for HTS can be found [**here in our Technical Documentation**](https://hifis.net/doc/core-services/fts-endpoint/).
 
 * A pre-configured version that can be deployed easily is available as a Docker image for either standalone or Kubernetes deployments in [this gitlab repository](https://gitlab.hzdr.de/hifis/fts-apache-k8s).
 * In case an administrator wants to set up the endpoint on their own, installation and configuration instructions are available in [another repository](https://gitlab.hzdr.de/hifis/hifis-transfer-service).