refactor: update Dockerfile to improve structure and clarity of comments

Dockerfile

@@ -1,24 +1,18 @@
-# Use Node.js LTS image with Python support
-FROM node:22-alpine
+FROM python:3.12-slim-bookworm
+COPY --from=ghcr.io/astral-sh/uv:latest /uv /uvx /bin/
 
-# Use mirror for faster package installation
+FROM node:22-alpine
 RUN npm config set registry https://registry.npmmirror.com
 
-# Set working directory
 WORKDIR /app
 
-# Copy package files and install dependencies
 COPY package.json pnpm-lock.yaml ./
 RUN npm install -g pnpm && pnpm install
 
-# Copy the rest of the application
 COPY . .
 
-# Build the application
 RUN pnpm build
 
-# Expose the port defined in .env
 EXPOSE 3000
 
-# Start the application
 CMD ["pnpm", "start"]