FROM node:18-slim

# Create app directory
WORKDIR /app

# Install dependencies first to leverage Docker cache
COPY package.json package-lock.json ./

RUN npm ci

# Copy the rest of the source code
COPY . .

# Build project from source
RUN npm run build

# Expose the port used by the dev server (BrowserSync)
EXPOSE 3000

# Start the app (builds again if needed, but should be fast after first run)
CMD ["npm", "start"]