TEMPORARY for DEBUG build the 'docker' branch

Author: rwest

Dockerfile

@@ -45,7 +45,7 @@ ENV PATH="/miniconda/bin:$PATH"
 SHELL ["/bin/bash", "-c"]
 
 # Add build arguments for RMG-Py, RMG-database, and RMS branches.
-ARG RMG_Py_Branch=main
+ARG RMG_Py_Branch=docker
 ARG RMG_Database_Branch=main
 ARG RMS_Branch=main
 ENV rmsbranch=${RMS_Branch}