add alt text to the mission diagram
@@ -21,6 +21,7 @@ The diagram below shows the typical architecture for a mission running KubOS:
.. figure:: images/mission_diagram.png
:align: center
+ :alt: block diagram depicting the software of a typical kubos-powered mission
Each of the boxes are independent processes, or *microservices*.
For example, we can revise the communication service to support a new radio, and the binaries of *all other services* are unchanged.
