UPD

Dockerfile

@@ -15,14 +15,15 @@ RUN apt-get install -y --no-install-recommends sqlite3 locales
 
 RUN export LC_ALL="it_IT.UTF-8"
 RUN export LC_CTYPE="it_IT.UTF-8"
-RUN dpkg-reconfigure locales
-
-# ENV MUSL_LOCPATH="/usr/share/i18n/locales/musl"
-
-# RUN apk --no-cache add \
-#     musl-locales \
-#     musl-locales-lang \
-#     python3
+# RUN dpkg-reconfigure locales
+
+# Set the locale
+RUN sed -i '/it_IT.UTF-8/s/^# //g' /etc/locale.gen && \
+    locale-gen
+ENV LANG it_IT.UTF-8  
+ENV LANGUAGE it_IT:it  
+ENV LC_ALL it_IT.UTF-8    
+ENV LC_TIME it_IT.UTF-8    
 
 # Set up a new user named "user" with user ID 1000
 RUN useradd -m -u 1000 user