# Stage 1: Build the React Application
FROM node:20 AS builder

WORKDIR /app

# Copy ONLY package.json. 
# We intentionally IGNORE package-lock.json to prevent architecture mismatches 
# (e.g., trying to install macOS binaries for esbuild on Linux).
COPY package.json ./

# Install dependencies from scratch for the container's architecture
RUN npm install

# Copy the rest of the application source code
COPY . .

# Build the frontend assets
RUN npm run build

# Stage 2: Setup the Production Server
FROM node:20

WORKDIR /app

# Copy ONLY package.json
COPY package.json ./

# Install ONLY production dependencies
RUN npm install --omit=dev

# Copy the built frontend assets from the 'builder' stage
COPY --from=builder /app/dist ./dist

# Copy the server entry point
COPY server.js ./

# Set environment variables
ENV NODE_ENV=production
ENV PORT=3000

# Expose the port
EXPOSE 3000

# Start the Node.js server
CMD ["npm", "start"]