Added the Dockerfile for the User Service.

Author: lawruixi

user-service/user-service/.dockerignore

@@ -1,15 +1,34 @@
-# deps & build artifacts
-node_modules
-npm-debug.log
-yarn.lock
-pnpm-lock.yaml
-dist
-build
-.cache
-*.log
+# Include any files or directories that you don't want to be copied to your
+# container here (e.g., local build artifacts, temporary files, etc.).
+#
+# For more help, visit the .dockerignore file reference guide at
+# https://docs.docker.com/go/build-context-dockerignore/
 
-# env/secrets (never bake into the image)
-.env
-.env.*
-.DS_Store
-.git
+**/.classpath
+**/.dockerignore
+**/.env
+**/.git
+**/.gitignore
+**/.project
+**/.settings
+**/.toolstarget
+**/.vs
+**/.vscode
+**/.next
+**/.cache
+**/*.*proj.user
+**/*.dbmdl
+**/*.jfm
+**/charts
+**/docker-compose*
+**/compose.y*ml
+**/Dockerfile*
+**/node_modules
+**/npm-debug.log
+**/obj
+**/secrets.dev.yaml
+**/values.dev.yaml
+**/build
+**/dist
+LICENSE
+README.md

user-service/user-service/Dockerfile

@@ -1,37 +1,38 @@
-# ---------- Base builder (installs deps) ----------
-FROM node:20-alpine AS deps
-WORKDIR /app
+# syntax=docker/dockerfile:1
 
-# If you have a package-lock.json, keep npm. If you use yarn/pnpm, adjust.
-COPY package*.json ./
-RUN npm ci --omit=dev
+# Comments are provided throughout this file to help you get started.
+# If you need more help, visit the Dockerfile reference guide at
+# https://docs.docker.com/go/dockerfile-reference/
 
-# ---------- Runtime image ----------
-FROM node:20-alpine AS runner
-ENV NODE_ENV=production
-WORKDIR /app
+# Want to help us make this template better? Share your feedback here: https://forms.gle/ybq9Krt8jtBL3iCk7
 
-# Copy node_modules from deps stage
-COPY --from=deps /app/node_modules ./node_modules
+ARG NODE_VERSION=22.21.0
+
+FROM node:${NODE_VERSION}-alpine
+
+# Use production node environment by default.
+ENV NODE_ENV production
 
-# Copy app source
-COPY . .
 
-# Security: run as non-root user
-RUN addgroup -S appgroup && adduser -S appuser -G appgroup
-USER appuser
+WORKDIR /usr/src/app
 
-# Healthcheck (optional but nice). If you have a /health route, use it.
-# Replace /health with your actual health endpoint.
-HEALTHCHECK --interval=30s --timeout=5s --start-period=20s --retries=3 \
-  CMD wget -qO- http://localhost:3001/health || exit 1
+# Download dependencies as a separate step to take advantage of Docker's caching.
+# Leverage a cache mount to /root/.npm to speed up subsequent builds.
+# Leverage a bind mounts to package.json and package-lock.json to avoid having to copy them into
+# into this layer.
+RUN --mount=type=bind,source=package.json,target=package.json \
+    --mount=type=bind,source=package-lock.json,target=package-lock.json \
+    --mount=type=cache,target=/root/.npm \
+    npm ci --omit=dev
+
+# Run the application as a non-root user.
+USER node
+
+# Copy the rest of the source files into the image.
+COPY . .
 
-# Expose the app port (matches your .env PORT)
+# Expose the port that the application listens on.
 EXPOSE 3001
 
-# Start command. Change if your service uses a different entry (e.g. dist/index.js).
-# Common cases:
-#  - "node src/server.js"
-#  - "node index.js"
-#  - "npm start" (if start script is set properly)
-CMD ["npm", "start"]
+# Run the application.
+CMD npm start

user-service/user-service/README.Docker.md

@@ -0,0 +1,22 @@
+### Building and running your application
+
+When you're ready, start your application by running:
+`docker compose up --build`.
+
+Your application will be available at http://localhost:3001.
+
+### Deploying your application to the cloud
+
+First, build your image, e.g.: `docker build -t myapp .`.
+If your cloud uses a different CPU architecture than your development
+machine (e.g., you are on a Mac M1 and your cloud provider is amd64),
+you'll want to build the image for that platform, e.g.:
+`docker build --platform=linux/amd64 -t myapp .`.
+
+Then, push it to your registry, e.g. `docker push myregistry.com/myapp`.
+
+Consult Docker's [getting started](https://docs.docker.com/go/get-started-sharing/)
+docs for more detail on building and pushing.
+
+### References
+* [Docker's Node.js guide](https://docs.docker.com/language/nodejs/)