Replaced pypi.tuna.tsinghua.edu.cn with mirrors.aliyun.com/pypi (#5309)

### What problem does this PR solve?

Replaced pypi.tuna.tsinghua.edu.cn with mirrors.aliyun.com/pypi.
I notice aliyun.com sometimes is much faster than tsinghua.edu.

### Type of change

- [x] Refactoring

Dockerfile

@@ -62,11 +62,11 @@ RUN --mount=type=cache,id=ragflow_apt,target=/var/cache/apt,sharing=locked \
     apt install -y python3-pip pipx nginx unzip curl wget git vim less
 
 RUN if [ "$NEED_MIRROR" == "1" ]; then \
-        pip3 config set global.index-url https://pypi.tuna.tsinghua.edu.cn/simple && \
-        pip3 config set global.trusted-host pypi.tuna.tsinghua.edu.cn; \
+        pip3 config set global.index-url https://mirrors.aliyun.com/pypi/simple && \
+        pip3 config set global.trusted-host mirrors.aliyun.com; \
         mkdir -p /etc/uv && \
         echo "[[index]]" > /etc/uv/uv.toml && \
-        echo 'url = "https://pypi.tuna.tsinghua.edu.cn/simple"' >> /etc/uv/uv.toml && \
+        echo 'url = "https://mirrors.aliyun.com/pypi/simple"' >> /etc/uv/uv.toml && \
         echo "default = true" >> /etc/uv/uv.toml; \
     fi; \
     pipx install uv
@@ -150,9 +150,9 @@ COPY pyproject.toml uv.lock ./
 # uv records index url into uv.lock but doesn't failover among multiple indexes
 RUN --mount=type=cache,id=ragflow_uv,target=/root/.cache/uv,sharing=locked \
     if [ "$NEED_MIRROR" == "1" ]; then \
-        sed -i 's|pypi.org|pypi.tuna.tsinghua.edu.cn|g' uv.lock; \
+        sed -i 's|pypi.org|mirrors.aliyun.com/pypi|g' uv.lock; \
     else \
-        sed -i 's|pypi.tuna.tsinghua.edu.cn|pypi.org|g' uv.lock; \
+        sed -i 's|mirrors.aliyun.com/pypi|pypi.org|g' uv.lock; \
     fi; \
     if [ "$LIGHTEN" == "1" ]; then \
         uv sync --python 3.10 --frozen; \

README_tzh.md

@@ -266,7 +266,7 @@ docker build --build-arg NEED_MIRROR=1 -f Dockerfile -t infiniflow/ragflow:night
 
    ```bash
    pipx install uv
-   export UV_INDEX=https://pypi.tuna.tsinghua.edu.cn/simple
+   export UV_INDEX=https://mirrors.aliyun.com/pypi/simple
    ```
 
 2. 下載原始碼並安裝 Python 依賴：

README_zh.md

@@ -267,7 +267,7 @@ docker build --build-arg NEED_MIRROR=1 -f Dockerfile -t infiniflow/ragflow:night
 
    ```bash
    pipx install uv
-   export UV_INDEX=https://pypi.tuna.tsinghua.edu.cn/simple
+   export UV_INDEX=https://mirrors.aliyun.com/pypi/simple
    ```
 
 2. 下载源代码并安装 Python 依赖：