- add image for allowed mime types

DataArchitectureDiagram.md

@@ -17,7 +17,6 @@ The general guideline for publishing research data <a href="https://tethys.at/do
 - the required use of keywords
 - Note that the uploaded data will be reviewed
 - what CC licenses can be used:
-
     <table style="border: 1px solid black;  border-collapse: collapse;">
       <tr>
         <th>CC Code</th>  
@@ -78,9 +77,16 @@ The general guideline for publishing research data <a href="https://tethys.at/do
         </td> 
         <td>Namensnennung; keine kommerzielle Nutzung; keine Veränderung erlaubt</td>
       </tr>  
-  
     </table>
 
+    <!-- ![valid mime types per 25.04.2023](./allowed_mime_types.png)
+    *allowed mime_types and file extensions in TETHYS RDR 2023* -->
+
+    <p>
+      <img src="./allowed_mime_types.png" alt="Mime Types">     
+      <figcaption>Fig.1 - valid mime types per 25.04.2023.</figcaption>
+    </p>
+
 # 2. Metadata Schema
 
 The **Metadata format guidelines** <a href="https://tethys.at/docs/HandbuchTethys.pdf#page=9" target="_blank">(manual, p. 8-10)</a> on the other hand, provides information on the specific types of metadata that should be included with the data. This may include information on the format and structure of the metadata, as well as the types of information that should be included. Tethys RDR is using three metadata standards (**Dublin Core, DataCite and ISO10130**) as well as one descriptive metadata element (dataset type). The dataset type is one of the following metadata elements: Analysis, Measurements, Monitoring, Remote Sensing, Geographic Information System (GIS), Models, and Mixed Type.