fix users for libfmt install

Dockerfile

@@ -1,23 +1,28 @@
 FROM jupyter/minimal-notebook:python-3.10
 
-USER jovyan
-
+# Installing package for libmamba
+USER root
 RUN apt-get update && \
     apt install -y \
     libfmt-dev
+USER jovyan
 
+# Set up conda
 RUN conda update conda 
 RUN conda config --remove channels conda-forge
 RUN conda config --add channels conda-forge
 RUN conda config --set channel_priority strict
 
+# Create environment
 COPY environment.yml /home/jovyan/ 
 RUN conda env update -n base -f /home/jovyan/environment.yml
-# using ~/.bash_profile instead of ~/.bashrc for non-interactive tty (-it) containers
+
+# Activating environment
 RUN echo ". /opt/conda/etc/profile.d/conda.sh" >> /home/jovyan/.bash_profile && \
     echo "conda deactivate" >> /home/jovyan/.bash_profile && \
     echo "conda activate base" >> /home/jovyan/.bash_profile
-RUN . /opt/conda/etc/profile.d/conda.sh && conda activate base && python -m ipykernel install --user --name base     
+RUN . /opt/conda/etc/profile.d/conda.sh && conda activate base && python -m ipykernel install --user --name base
+# using ~/.bash_profile instead of ~/.bashrc for non-interactive tty (-it) containers
 RUN source /home/jovyan/.bash_profile
 
 # Install dev version of Earthpy