更新 Dockerfile，升级 pip 并安装依赖，修改 start.sh 权限设置

Dockerfile

@@ -9,8 +9,6 @@ ENV HOME=/home/user \
 
 WORKDIR $HOME/sr_api
 
-RUN pip install --no-cache-dir --upgrade pip
-
 COPY --chown=user . $HOME/sr_api
 
 USER root
@@ -18,9 +16,12 @@ USER root
 RUN apt-get update && apt-get install -y ffmpeg libsm6 libxext6 redis && \
     apt-get clean && rm -rf /var/lib/apt/lists/*
 
-COPY start.sh /start.sh
-RUN chown user:user /start.sh && chmod +x /start.sh
-
 USER user
 
+RUN pip install --no-cache-dir --upgrade pip && \
+    pip install --no-cache-dir -r requirements.txt
+
+COPY start.sh /start.sh
+RUN chmod +x /start.sh
+
 ENTRYPOINT ["/start.sh"]