diff --git a/Dockerfile b/Dockerfile
index 7531d6f91..e2b330433 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,11 @@
 FROM python:3.10.0-alpine
 
-ENV PIP_INDEX_URL=https://pypi.tuna.tsinghua.edu.cn/simple
+# Official PyPI is preferred when reachable.
+ENV PIP_INDEX_URL=https://pypi.org/simple
+
+# Use the mirror when official PyPI is unreachable.
+# ENV PIP_INDEX_URL=https://pypi.tuna.tsinghua.edu.cn/simple
+
 RUN pip install --upgrade pip
 RUN pip install mkdocs-material==9.5.5 mkdocs-glightbox
 
@@ -20,6 +25,14 @@ COPY en/docs ./build/en/docs
 COPY en/mkdocs.yml ./en/mkdocs.yml
 RUN mkdocs build -f ./en/mkdocs.yml
 
+COPY ja/docs ./build/ja/docs
+COPY ja/mkdocs.yml ./ja/mkdocs.yml
+RUN mkdocs build -f ./ja/mkdocs.yml
+
+COPY ru/docs ./build/ru/docs
+COPY ru/mkdocs.yml ./ru/mkdocs.yml
+RUN mkdocs build -f ./ru/mkdocs.yml
+
 WORKDIR /hello-algo/site
 EXPOSE 8000
 CMD ["python", "-m", "http.server", "8000"]