Use rel link to diagram and site update

.github/workflows/dox.yml

@@ -82,6 +82,12 @@ jobs:
     - name: Copy API documentation
       run: cp -a apidoc site/
 
+    - name: Assert site/resources/
+      run: mkdir -p site/resources 
+
+    - name: Copy Figures
+      run: cp -a resources/SuperNOVAS-systems.png site/resources/
+
     - name: Push to pages
       run: |
         cd site

README.md

@@ -377,7 +377,7 @@ In NOVAS, the barycentric BCRS and the geocentric GCRS systems are effectively s
 positions and for velocities, in any reference system, is determined by the `observer` location in the vicinity of 
 Earth (at the geocenter, on the surface, or in Earth orbit).
 
-| ![SuperNOVAS coordinate systems and conversions](https://github.com/Smithsonian/SuperNOVAS/blob/main/resources/SuperNOVAS-systems.png) |
+| ![SuperNOVAS coordinate systems and conversions](resources/SuperNOVAS-systems.png) |
 |:--:| 
 | __Figure 1.__ *SuperNOVAS Coordinate Systems and Conversions*. Functions indicated in bold face are available in NOVAS C also. All other functions are available in SuperNOVAS only.              |