Add python 3.10 image and testing

containers/dockerfile-template

@@ -30,8 +30,7 @@ RUN conda install -n ${{conda_env}} -c conda-forge scikit-image celerite george
 
 # Install dependencies and samplers
 RUN pip install corner healpy cython tables
-RUN conda install -n ${{conda_env}} -c conda-forge {conda_samplers}
-RUN pip install nessai
+RUN conda install -n ${{conda_env}} -c conda-forge -c pytorch {conda_samplers}
 
 # Install Polychord
 RUN apt-get update --allow-releaseinfo-change