use init an activate in one line

Author: stadie

Dockerfile

@@ -3,11 +3,10 @@ FROM condaforge/miniforge3:24.9.2-0
 ARG APPS_DIR=/usr/local
 RUN conda create -y --name geant --channel=conda-forge geant4 root cmake make
 RUN conda clean --all
-RUN conda init
-RUN conda activate geant
 
 ARG VMC_DIR=$APPS_DIR/vmc
-RUN git clone http://github.com/vmc-project/vmc.git $VMC_DIR/git_source && \
+RUN conda init && conda activate geant && \
+    git clone http://github.com/vmc-project/vmc.git $VMC_DIR/git_source && \
     cd $VMC_DIR && \
     git checkout v2-0 && \
     mkdir build && \