# syntax=docker/dockerfile:1.7
ARG NODE_VERSION=20.15.0
FROM node:${NODE_VERSION}-alpine AS build
WORKDIR /app

# Install deps first for better caching
COPY package*.json ./
RUN npm ci || npm install

# Build
COPY . .
ENV NODE_ENV=production
# Limit Node heap during build to avoid OOM on small builders
ENV NODE_OPTIONS=--max-old-space-size=512
RUN npm run build

# ---- Runtime (Nginx) ----
FROM nginx:1.27-alpine AS runtime
# Remove default site content
RUN rm -rf /usr/share/nginx/html/*
# SPA config (history fallback)
COPY docker/nginx.conf /etc/nginx/conf.d/default.conf
# Static assets
COPY --from=build /app/dist /usr/share/nginx/html
EXPOSE 80
HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
  CMD wget -qO- http://localhost/ >/dev/null 2>&1 || exit 1
CMD ["nginx", "-g", "daemon off;"]