Switched from conda to mamba

Dockerfile

@@ -10,6 +10,6 @@ RUN pip install -r requirements.txt
 ADD environment.yml /tmp/environment.yml
 
 # All packages specified in environment.yml are installed in the base environment
-RUN conda env update -f /tmp/environment.yml && \
-    conda clean -a -f -y
+RUN mamba env update -f /tmp/environment.yml && \
+    mamba clean -a -f -y