backend/Dockerfile

# Backend Dockerfile (HF Spaces compatible)

FROM node:20-alpine as base

WORKDIR /app

# Install dependencies for native modules + wget for healthcheck
RUN apk add --no-cache python3 make g++ wget

# Copy package files
COPY package*.json ./

# ========================
# Development stage
# ========================
FROM base as development
RUN npm ci
COPY . .
EXPOSE 7860
CMD ["npm", "run", "dev"]

# ========================
# Production stage
# ========================
FROM base as production

ENV NODE_ENV=production

# Install production dependencies only
RUN npm ci --omit=dev

# Copy source files
COPY . .

# Create non-root user (uid 1000 required by HF Spaces)
RUN set -ex && \
    if ! getent group 1000 > /dev/null 2>&1; then \
      addgroup -g 1000 -S nodejs; \
    fi && \
    GROUP_NAME=$(getent group 1000 | cut -d: -f1) && \
    if ! getent passwd 1000 > /dev/null 2>&1; then \
      adduser -D -u 1000 -G ${GROUP_NAME} nodejs; \
    fi && \
    chown -R 1000:1000 /app

USER 1000

# EXPOSE is informational (HF ignores it but safe to keep)
EXPOSE 7860

# Healthcheck probes backend on port 7860
HEALTHCHECK --interval=30s --timeout=10s --start-period=30s --retries=3 \
  CMD wget --no-verbose --tries=1 --spider http://127.0.0.1:7860/health || exit 1

CMD ["node", "server.js"]