locale tweaks in dockerfile

Author: hjwp

Dockerfile

@@ -1,16 +1,12 @@
 FROM python:slim
 
-# -- WIP --
-# this dockerfile is a work in progress,
-# the vague intention is to use it for CI.
+# -- Dockerfile is mainly for use in CI --
 
-# RUN add-apt-repository ppa:mozillateam/ppa && \
 RUN apt-get update -y
 
 RUN apt-get install -y \
     git \
     asciidoctor \
-    # language-pack-en \
     ruby-pygments.rb \
     firefox-esr \
     tree \
@@ -20,10 +16,10 @@ RUN apt-get install -y \
     make \
     curl
 
+RUN echo "en_GB.UTF-8 UTF-8" > /etc/locale.gen
 ENV LC_ALL=en_GB.UTF-8 LANG=en_GB.UTF8 LANGUAGE=en_GB:en
+RUN locale-gen
 
-RUN locale-gen en_GB.UTF-8
-# RUN pip install uv
 ADD --chmod=755 https://astral.sh/uv/install.sh /install.sh
 RUN /install.sh && rm /install.sh
 RUN ln -s $HOME/.cargo/bin/uv /usr/bin/uv