added language support for german

Dockerfile

@@ -8,6 +8,16 @@ WORKDIR /blog
 
 RUN pip3 install -r requirements.txt
 
+RUN apt-get update && \
+    apt-get install -y locales && \
+    sed -i -e 's/# de_DE.UTF-8 UTF-8/de_DE.UTF-8 UTF-8/' /etc/locale.gen && \
+    sed -i '/en_US.UTF-8/s/^# //g' /etc/locale.gen && \
+    dpkg-reconfigure --frontend=noninteractive locales
+
+ENV LANG en_US.UTF-8
+ENV LANGUAGE en_US:en
+ENV LC_ALL en_US.UTF-8
+
 VOLUME /blog/templates/entry
 
 VOLUME /blog/static/graphics