devcontainer update: locale + venv

.devcontainer/Dockerfile

@@ -1,9 +1,15 @@
 FROM python:3.11-slim-bookworm as development
 WORKDIR /app
-RUN apt-get -y update && apt-get install -yqq dos2unix chromium chromium-driver \
-    libxi6 libgconf-2-4 python3-selenium \
-    tzdata git
-RUN git config --global --add safe.directory /usr/src/app
+RUN apt-get -y update && apt-get install -yqq dos2unix \
+    libxi6 libgconf-2-4 \
+    tzdata git gcc
+RUN apt-get install -y locales && \
+    sed -i -e 's/# en_GB.UTF-8 UTF-8/en_GB.UTF-8 UTF-8/' /etc/locale.gen && \
+    dpkg-reconfigure --frontend=noninteractive locales && \
+    locale-gen
+ENV LANG en_GB.UTF-8
+ENV LC_ALL en_GB.UTF-8    
+RUN git config --global --add safe.directory /app
 RUN python3 -m pip install --upgrade pip
 RUN python3 -m pip install --user virtualenv
 ENV TZ=Europe/Berlin