switch to preinstalled ubuntu user

docker/coder-ubuntu_24-python/Dockerfile

 FROM ubuntu:24.04
 LABEL authors="sebastian"
 
-SHELL ["/bin/bash", "-c"]
-
 ENV DEBIAN_FRONTEND=noninteractive
 RUN apt-get update && apt-get upgrade -y
 
@@ -42,23 +40,21 @@ RUN apt-get install -y htop \
     pv \
     brotli
 
-# create coder user
-RUN useradd -ms /bin/bash coder
-RUN usermod -aG sudo coder
-
-# allow sudo without password
-RUN echo '%sudo ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers
-
 # clean up
 RUN apt-get clean
 RUN rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
-# switch to coder user
-USER coder
-WORKDIR /home/coder
+# add ubuntu user to sudo
+RUN usermod -aG sudo ubuntu
+
+# allow sudo without password
+RUN echo '%sudo ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers
+
+# switch to ubuntu user
+USER ubuntu
+WORKDIR /home/ubuntu
 
 # activate miniconda
-RUN source /opt/miniconda3/bin/activate
 RUN /opt/miniconda3/bin/conda init --all
 ENV PATH="${PATH}:/opt/miniconda3/bin"
 
@@ -66,7 +62,7 @@ ENV PATH="${PATH}:/opt/miniconda3/bin"
 ENV PATH="${PATH}:/opt/poetry/bin"
 
 # add .local/bin to PATH to be able to directly call python modules installed by pipx
-ENV PATH="${PATH}:/home/coder/.local/bin"
+ENV PATH="${PATH}:/home/ubuntu/.local/bin"
 
 # prevent tensorflow from allocation all vram
 ENV TF_FORCE_GPU_ALLOW_GROWTH=true