Update Dockerfile

Dockerfile

@@ -5,7 +5,7 @@ RUN useradd -m -u 1000 appuser
 RUN mkdir -p /app/saved_models && chown -R appuser:appuser /app
 COPY requirements.txt .
 
-# Install build dependencies, including Python development tools
+# Install build dependencies, including Python development tools and gflags
 RUN apt-get update && apt-get install -y \
     build-essential \
     libatlas-base-dev \
@@ -14,6 +14,7 @@ RUN apt-get update && apt-get install -y \
     git \
     cmake \
     python3-dev \
+    libgflags-dev \
     && rm -rf /var/lib/apt/lists/*
 
 # Install NumPy before building FAISS