Dockerfile: add debug output

Dockerfile

@@ -3,11 +3,21 @@ FROM linuxserver/blender:5.2.1
 ENV DEBIAN_FRONTEND=noninteractive
 ENV PIP_NO_CACHE_DIR=1
 
-# 非 root 用户（linuxserver 镜像已有 abc 用户 UID 1000）
+# 调试：查看基础镜像信息
+RUN echo "=== Base image info ===" && \
+    cat /etc/os-release && \
+    python3 --version && \
+    pip --version && \
+    blender --version && \
+    id
+
+# 非 root 用户（linuxserver 镜像用户是 abc UID 1000）
 WORKDIR /app
 
 COPY requirements.txt .
-RUN pip install -r requirements.txt
+RUN echo "=== Installing Python deps ===" && \
+    pip install -r requirements.txt && \
+    echo "=== Python deps installed ==="
 
 COPY app.py worker.py ./