Update Docker base image to version 0.5.0

Author: jorgensd

Dockerfile

@@ -1,4 +1,4 @@
-FROM ghcr.io/methods-group/proximalgalerkin:v0.4.0 AS pg
+FROM ghcr.io/methods-group/proximalgalerkin:v0.5.0 AS pg
 
 
 # create user with a home directory
@@ -30,4 +30,4 @@ COPY --chown=${NB_UID} . ${HOME}
 
 USER ${NB_USER}
 RUN python3 -m pip install -e .
-ENTRYPOINT []
+ENTRYPOINT []