add rsync to docker

Docker/Dockerfile-base

@@ -220,6 +220,7 @@ RUN export DEBIAN_FRONTEND=noninteractive && \
         python3 \
         python3-casacore \
         python3-distutils \
+        rsync \
         wget && \
     rm -rf /var/lib/apt/lists/*
 

scripts/tune_demixing_parameters.py

@@ -276,7 +276,7 @@ class DemixingTuner:
     def get_target_skymodel(self,overwrite=True):
         if overwrite:
           sb.run('rm -rvf '+self.target_skymodel,shell=True)
-        sb.run('python '+self.LINC_GET_TARGET+' --Radius 5 --targetname CENTER '+self.extracted_ms[0]+' '+self.target_skymodel,shell=True)
+        sb.run('python3 '+self.LINC_GET_TARGET+' --Radius 5 --targetname CENTER '+self.extracted_ms[0]+' '+self.target_skymodel,shell=True)
 
     # convert integer to binary bits, return array of size K
     def scalar_to_kvec(self,n):