# Use an official Node.js runtime as a parent image
FROM node:18-slim

# Set the working directory in the container
WORKDIR /usr/src/app

# Copy package.json and package-lock.json (or yarn.lock)
COPY package*.json ./

# Install application dependencies
RUN npm install

# Bundle app source
COPY . .

# Expose the port the app runs on (if it has an HTTP server for internal checks, though not strictly necessary for a router)
EXPOSE 3001

# Define the command to run the app
CMD [ "node", "router.js" ]