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+# ---------- build frontend ----------
+FROM node:20-bookworm AS frontend-build
+WORKDIR /frontend
+COPY frontend/package.json frontend/package-lock.json* ./
+RUN npm install
+COPY frontend/ .
+RUN npm run build
+
+# ---------- build runtime ----------
+FROM python:3.11-slim AS runtime
+WORKDIR /app
+
+# Install Caddy (simple static + reverse proxy)
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    curl ca-certificates \
+  && rm -rf /var/lib/apt/lists/* \
+  && curl -1sLf "https://dl.cloudsmith.io/public/caddy/stable/gpg.key" | tee /etc/apt/trusted.gpg.d/caddy.asc >/dev/null \
+  && curl -1sLf "https://dl.cloudsmith.io/public/caddy/stable/debian.deb.txt" | tee /etc/apt/sources.list.d/caddy-stable.list \
+  && apt-get update && apt-get install -y --no-install-recommends caddy \
+  && rm -rf /var/lib/apt/lists/*
+
+# Backend deps
+COPY backend/requirements.txt /app/backend/requirements.txt
+RUN pip install --no-cache-dir -r /app/backend/requirements.txt
+
+# Copy backend code
+COPY backend /app/backend
+
+# Copy frontend build output from builder
+COPY --from=frontend-build /frontend/dist /app/frontend/dist
+
+# Copy Caddy config
+COPY Caddyfile /app/Caddyfile
+
+# Expose HF port
+EXPOSE 7860
+
+# Start both: FastAPI (8000) + Caddy (7860)
+CMD sh -c "uvicorn backend.app.main:app --host 0.0.0.0 --port 8000 & caddy run --config /app/Caddyfile --adapter caddyfile"# ---------- build frontend ----------
+FROM node:20-bookworm AS frontend-build
+WORKDIR /frontend
+COPY frontend/package.json frontend/package-lock.json* ./
+RUN npm install
+COPY frontend/ .
+RUN npm run build
+
+# ---------- build runtime ----------
+FROM python:3.11-slim AS runtime
+WORKDIR /app
+
+# Install Caddy (simple static + reverse proxy)
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    curl ca-certificates \
+  && rm -rf /var/lib/apt/lists/* \
+  && curl -1sLf "https://dl.cloudsmith.io/public/caddy/stable/gpg.key" | tee /etc/apt/trusted.gpg.d/caddy.asc >/dev/null \
+  && curl -1sLf "https://dl.cloudsmith.io/public/caddy/stable/debian.deb.txt" | tee /etc/apt/sources.list.d/caddy-stable.list \
+  && apt-get update && apt-get install -y --no-install-recommends caddy \
+  && rm -rf /var/lib/apt/lists/*
+
+# Backend deps
+COPY backend/requirements.txt /app/backend/requirements.txt
+RUN pip install --no-cache-dir -r /app/backend/requirements.txt
+
+# Copy backend code
+COPY backend /app/backend
+
+# Copy frontend build output from builder
+COPY --from=frontend-build /frontend/dist /app/frontend/dist
+
+# Copy Caddy config
+COPY Caddyfile /app/Caddyfile
+
+# Expose HF port
+EXPOSE 7860
+
+# Start both: FastAPI (8000) + Caddy (7860)
+CMD sh -c "uvicorn backend.app.main:app --host 0.0.0.0 --port 8000 & caddy run --config /app/Caddyfile --adapter caddyfile