Dockerfile

# Use a multi-stage build to keep the final image lean
# Stage 1: Build the application
FROM node:20-alpine as builder

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

# Copy package.json and package-lock.json (or yarn.lock if you use Yarn)
COPY package*.json ./

# Install all dependencies
RUN npm install

# Copy the rest of the application code
COPY . .

# Build the application
RUN npm run build

# Stage 2: Create the lean production image
FROM node:20-alpine

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

# Copy package.json and package-lock.json (or yarn.lock if you use Yarn)
COPY package*.json ./

# Install only production dependencies
RUN npm install --only=production

# Copy built assets from the builder stage
COPY --from=builder /usr/src/app/dist ./dist

# Your application's default port
EXPOSE 3000

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