# Stage 1: Build
FROM node:20-alpine AS builder

WORKDIR /app

# Install dependencies first (layer caching)
COPY package.json ./
RUN npm install

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

# Stage 2: Serve
FROM nginx:alpine

# Remove default nginx config
RUN rm /etc/nginx/conf.d/default.conf

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

# Vite dist: index.html, hashed chunks, public files (e.g. assets/game/manifest.json),
# and PNGs under assets/tiles|enemies|prop|building|characters|obj (see vite.config assetFileNames).
COPY --from=builder /app/dist /usr/share/nginx/html

EXPOSE 80

CMD ["nginx", "-g", "daemon off;"]