Dockerfile

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

# Set the working directory inside the container
WORKDIR /app

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

# Set NODE_ENV environment variable
ENV NODE_ENV production

# Running `npm ci` removes the existing node_modules directory and passing in --only=production ensures that only the production dependencies are installed. This ensures that the node_modules directory is as optimized as possible
RUN npm ci --only=production && npm cache clean --force

# Install Nest CLI globally
RUN npm install -g @nestjs/cli

# Copy the rest of the application code to the container
COPY . .

# Build the NestJS application
RUN npm run build

# Expose the port your application will run on
EXPOSE 3000

# Command to start your NestJS application
CMD ./scheduler.sh & node dist/src/main.js