Update Dockerfile

Dockerfile

@@ -5,9 +5,12 @@ FROM langgenius/dify-api:1.11.2
 
 USER root
 
-# Install only Nginx (minimal)
-RUN apt-get update && apt-get install -y --no-install-recommends nginx \
-    && rm -rf /var/lib/apt/lists/*
+# Install Nginx and Locales
+RUN apt-get update && apt-get install -y --no-install-recommends nginx locales \
+    && rm -rf /var/lib/apt/lists/* \
+    && localedef -i en_US -c -f UTF-8 -A /usr/share/locale/locale.alias en_US.UTF-8
+
+ENV LANG=en_US.UTF-8
 
 # Copy pre-built web
 COPY --from=web /app/web /app/web