Fixed weird bug causing unit test failure, updated Changelog and docker service version

Author: jackiryan

CHANGELOG.md

@@ -11,6 +11,12 @@ Changelog](http://keepachangelog.com/en/1.0.0/).
 * GitHub release notes for HyBIG will now include the commit history for that
   release.
 
+## [v2.4.2] - Unreleased
+
+### Changed
+
+* Dynamically determine nodata index based on where it is supplied in the remote/embedded color table for a product.
+
 ## [v2.4.1] - 2025-06-23
 
 ### Changed

docker/service_version.txt

@@ -1 +1 @@
-2.4.1
+2.4.2

hybig/browse.py

@@ -312,7 +312,7 @@ def scale_grey_1band(data_array: DataArray) -> tuple[ndarray, ColorMap]:
     normalized_data = norm(band) * 254.0
 
     # Set any missing to missing
-    normalized_data[np.isnan(normalized_data)] = DST_NODATA
+    normalized_data[np.isnan(normalized_data)] = NODATA_IDX
 
     grey_colormap = greyscale_colormap()
     raster_data = np.expand_dims(np.round(normalized_data).data, 0)