Install build toolchain so llama-cpp-python can compile

Dockerfile

@@ -4,6 +4,10 @@ ENV PYTHONDONTWRITEBYTECODE=1
 ENV PYTHONUNBUFFERED=1
 ENV PIP_NO_CACHE_DIR=1
 
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends build-essential cmake \
+    && rm -rf /var/lib/apt/lists/*
+
 WORKDIR /app
 
 COPY requirements.txt /app/requirements.txt