Dockerfile

# ── Stage 1: Build frontend ──────────────────────────────────────────────────
FROM node:22-alpine AS frontend-build
WORKDIR /build/frontend
COPY frontend/package.json frontend/package-lock.json ./
RUN npm ci
COPY frontend/ ./
RUN npm run build

# ── Stage 2: Python runtime ─────────────────────────────────────────────────
FROM python:3.13-slim

# Install curl for health checks
RUN apt-get update && apt-get install -y --no-install-recommends curl && rm -rf /var/lib/apt/lists/*

# Recreate the same directory layout the app expects:
#   /app/backend/   ← working directory (main.py, routers/, etc.)
#   /app/frontend/dist/  ← built SPA
#   /app/data/           ← subtitles & translated (ephemeral)
WORKDIR /app/backend

COPY backend/requirements.txt ./
RUN pip install --no-cache-dir -r requirements.txt

ENV SRT_ENV=production

COPY backend/ ./
COPY --from=frontend-build /build/frontend/dist /app/frontend/dist

# Pre-create data directories
RUN mkdir -p /app/data/subtitles /app/data/translated

EXPOSE 8000

HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
    CMD curl -f http://localhost:8000/api/health || exit 1

CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]