Added a simple example to the documentation homepage. (#44)

Author: roytsmart

docs/index.rst

@@ -7,6 +7,32 @@ spaceflight.
 
 |
 
+Examples
+--------
+Load and display a single FITS file.
+
+.. jupyter-execute::
+
+    import matplotlib.pyplot as plt
+    import named_arrays as na
+    import msfc_ccd
+
+    # Load the sample image
+    image = msfc_ccd.fits.open(msfc_ccd.samples.path_fe55_esis1)
+
+    # Display the sample image
+    fig, ax = plt.subplots(
+        constrained_layout=True,
+    )
+    im = na.plt.imshow(
+        image.outputs.value,
+        axis_x=image.axis_x,
+        axis_y=image.axis_y,
+        ax=ax,
+    );
+
+|
+
 
 API Reference
 =============