include bash_kernel in all images

.gitlab-ci.yml

@@ -11,6 +11,7 @@ variables:
   rules:
     - changes: 
       - $IMAGE_NAME/Dockerfile
+      - basis/*
   before_script:
     - docker login -u $DOCKER_HUB_USER -p $DOCKER_TOKEN
   script:

basis/Dockerfile

@@ -25,7 +25,7 @@ RUN apt-get update -y && apt-get upgrade -y && \
 
 ### installing pip packages
 RUN pip install numpy seaborn scipy matplotlib uncertainties pyunfold PhyPraKit pandas\
-    kafe2 pydot graphviz scikit-learn jupytext nbgitpuller jupyterlab-git ipympl pyarrow ipywidgets jupyter-server --upgrade --no-cache-dir
+    kafe2 pydot graphviz scikit-learn jupytext nbgitpuller jupyterlab-git ipympl pyarrow ipywidgets jupyter-server bash_kernel --upgrade --no-cache-dir
 
 RUN pip install iminuit --no-cache