- 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>  
@@ -78,8 +77,15 @@ 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>
 
-</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