Dockerfile

# Stage 1: Build
# Use an official Node.js runtime as a parent image
FROM node:20-alpine as builder

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

# Copy package.json and package-lock.json for installing dependencies
COPY package*.json ./

# Install dependencies
RUN npm install

# Copy the rest of the application code
COPY . .
RUN npm run build

# Stage 2: Runtime
# Use an official Node.js runtime as a parent image for the runtime stage
FROM node:20-alpine

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

# Copy built assets from the builder stage
COPY --from=builder /usr/src/app/dist ./dist
COPY package*.json ./
RUN npm ci --only=production

# Use a non-root user to run the application for security purposes
USER node

# Expose the port the app runs on
EXPOSE 3000

# Command to run the application
CMD ["node", "dist/app.js"]