1  # syntax=docker/dockerfile:1
 2  
 3  # Comments are provided throughout this file to help you get started.
 4  # If you need more help, visit the Dockerfile reference guide at
 5  # https://docs.docker.com/engine/reference/builder/
 6  
 7  ARG NODE_VERSION=19.5.0
 8  
 9  FROM node:${NODE_VERSION}-alpine
10  
11  # Use production node environment by default.
12  ENV NODE_ENV production
13  
14  # Change working directory
15  WORKDIR /usr/src/app
16  
17  # Download dependencies as a separate step to take advantage of Docker's caching.
18  # Leverage a cache mount to /root/.npm to speed up subsequent builds.
19  # Leverage a bind mounts to package.json and package-lock.json to avoid having to copy them into
20  # into this layer.
21  RUN --mount=type=bind,source=package.json,target=package.json \
22      --mount=type=bind,source=package-lock.json,target=package-lock.json \
23      --mount=type=cache,target=/root/.npm \
24      npm ci --omit=dev
25  
26  # Run the application as a non-root user.
27  USER node
28  
29  # Copy the rest of the source files into the image.
30  COPY . .
31  
32  # Expose the port that the application listens on.
33  EXPOSE 3001
34  
35  # Run the application.
36  CMD npm run dev