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

WORKDIR /app

# Copy package.json to install dependencies first (better caching)
COPY package.json ./

# Install all dependencies (including devDependencies for the build process)
RUN npm install

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

# Build the frontend assets (Vite will output to /app/dist)
RUN npm run build

# Stage 2: Setup the Production Server (Node.js)
FROM node:20-alpine

WORKDIR /app

# Copy package.json again for production dependencies
COPY package.json ./

# Install ONLY production dependencies (skips devDependencies like Vite/Typescript)
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 (defaults)
ENV NODE_ENV=production
ENV PORT=3000

# Expose the port the app runs on
EXPOSE 3000

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