Update Dockerfile

Dockerfile

@@ -8,7 +8,9 @@ WORKDIR /app
 
 RUN wget -qO- "https://cmake.org/files/v3.17/cmake-3.17.0-Linux-x86_64.tar.gz" | tar --strip-components=1 -xz -C /usr/local
 RUN CMAKE_ARGS="-DLLAMA_OPENBLAS=on" FORCE_CMAKE=1 pip install llama-cpp-python
-RUN pip install -r requirements.txt
+COPY requirements.txt ./
+RUN pip install --upgrade pip && \
+    pip install -r requirements.txt
 
 RUN curl -s https://packagecloud.io/install/repositories/github/git-lfs/script.deb.sh | bash
 RUN apt-get install git-lfs