# syntax=docker/dockerfile:1.7

# --- Build stage ------------------------------------------------------------
FROM node:20-alpine AS build
WORKDIR /app

# Copy package files for dependency caching
COPY package*.json ./
RUN npm ci

# Copy source and build
COPY . .
RUN npm run build

# Verify build output
RUN ls -la dist/ && test -f dist/index.html || (echo "ERROR: index.html not found!" && exit 1)

# --- Runtime stage ----------------------------------------------------------
FROM nginx:1.27-alpine AS runtime

# Install wget for healthcheck
RUN apk add --no-cache wget

# Copy nginx config
COPY nginx.conf /etc/nginx/conf.d/default.conf

# Copy built app
COPY --from=build /app/dist/ /usr/share/nginx/html/

# Verify files were copied
RUN ls -la /usr/share/nginx/html/ && test -f /usr/share/nginx/html/index.html || (echo "ERROR: index.html not copied!" && exit 1)

EXPOSE 80

# Healthcheck
HEALTHCHECK --interval=30s --timeout=5s --retries=3 --start-period=10s \
  CMD wget --no-verbose --tries=1 --spider http://127.0.0.1/ || exit 1