simplify dockerfile and docker-compose files

Dockerfile

@@ -3,19 +3,6 @@ FROM python:3.11-slim as builder
 
 WORKDIR /app
 
-# Install build dependencies
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    build-essential \
-    curl \
-    pkg-config \
-    libssl-dev \
-    && curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y \
-    && . "$HOME/.cargo/env" \
-    && rustup default stable \
-    && rm -rf /var/lib/apt/lists/*
-
-ENV PATH="/root/.cargo/bin:${PATH}"
-
 # Copy only requirements files first to leverage Docker cache
 COPY requirements.txt .
 COPY lightrag/api/requirements.txt ./lightrag/api/