init backend

dockerfile

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+# --- Base image with Node + Python ---
+FROM ubuntu:22.04
+
+# --- Install system dependencies ---
+RUN apt-get update && apt-get install -y \
+    curl python3 python3-pip git build-essential libgl1 libglvnd0 ffmpeg unzip \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+# --- Install Bun ---
+RUN curl -fsSL https://bun.sh/install | bash
+ENV PATH="/root/.bun/bin:${PATH}"
+
+# --- Install Python dependencies ---
+RUN pip3 install --upgrade pip
+RUN pip3 install torch --index-url https://download.pytorch.org/whl/cpu
+RUN pip3 install --no-cache-dir fastapi uvicorn pillow open-clip-torch numpy faiss-cpu python-multipart
+
+# --- Copy project files ---
+WORKDIR /app
+COPY python_service ./python_service
+COPY src ./src
+COPY package.json .
+COPY bun.lock .
+
+# --- Expose ports ---
+EXPOSE 3000
+
+# --- Start services ---
+# Use & to run Python worker in background, Bun frontend as main process
+CMD python3 python_service/app.py & bun run src/index.ts