# Use the official Node.js 20 image as the base image
FROM node:20

# Set the working directory in the container
WORKDIR /app

# Copy the package.json and package-lock.json files to the container
COPY package*.json ./

# Install the dependencies
RUN npm install

# Copy the rest of the application's source code to the container
COPY . .

# Build the React.js application
RUN npm run build

# Install serve globally so startup is instant (no npx download delay)
RUN npm install -g serve

# Expose the port that the application listens on
EXPOSE 3000

# Start a simple web server to serve the built React.js files
CMD [ "serve", "-s", "build" ]