Bootstrap pip via ensurepip in builder stage

python:3.11-slim has neither curl nor pip. Using ensurepip to get
pip, then pip install uv from the local registry mirror. This avoids
any network dependency on pypi.org or astral.sh.

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

Dockerfile

@@ -14,12 +14,15 @@ FROM python:3.11-slim AS builder
 
 WORKDIR /app
 
-# Install uv — download the pre-built binary directly from GitHub releases
-# and add it to PATH for this layer.
-RUN curl -LsSf https://astral.sh/uv/install.sh | sh \
-    && . /usr/local/env 2>/dev/null || true
+# python:3.11-slim has neither curl nor pip. Bootstrap pip via ensurepip,
+# then use it to install uv from the local PyPI mirror.
+RUN python -m ensurepip --upgrade \
+    && python -m pip install --break-system-packages \
+        --index-url https://pypi.reg.darano.ir/simple/ \
+        --trusted-host pypi.reg.darano.ir \
+        uv
 
-ENV PATH="/root/.local/bin:$PATH" \
+ENV PATH="/usr/local/bin:$PATH" \
     UV_DEFAULT_INDEX="https://pypi.reg.darano.ir"
 
 COPY pyproject.toml uv.lock* ./