# ---- Builder Stage ----
# Use official Node.js 20 (Alpine)
FROM node:20-alpine AS builder

# Install init system
RUN apk add --no-cache dumb-init

# App dir
WORKDIR /app

# Copy package files
COPY package*.json ./

# Install production deps
RUN npm ci --only=production && npm cache clean --force

# ---- Final Stage ----
FROM node:20-alpine

LABEL maintainer="your-email@example.com"
LABEL org.opencontainers.image.source="https://github.com/yourname/uta-gtfs-mysql"

# Install dumb-init + MySQL client (optional but common)
RUN apk add --no-cache dumb-init mysql-client

# Create non-root user
RUN addgroup -g 1001 -S nodejs \
    && adduser -S utauser -u 1001

WORKDIR /app

# Copy node_modules from builder
COPY --from=builder /app/node_modules ./node_modules

# Copy app source
COPY . .

RUN chown -R utauser:nodejs /app
USER utauser

# Healthcheck – you may want to change port if needed
HEALTHCHECK --interval=30s --timeout=3s --start-period=60s --retries=3 \
  CMD wget -qO- http://localhost:3000/ || exit 1

EXPOSE 3000

ENTRYPOINT ["dumb-init", "--"]

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