added docker

.dockerignore

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+# 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/
+
+**/.classpath
+**/.dockerignore
+**/.env
+**/.git
+**/.gitignore
+**/.project
+**/.settings
+**/.toolstarget
+**/.vs
+**/.vscode
+**/.next
+**/.cache
+**/*.*proj.user
+**/*.dbmdl
+**/*.jfm
+**/charts
+**/docker-compose*
+**/compose*
+**/Dockerfile*
+**/node_modules
+**/npm-debug.log
+**/obj
+**/secrets.dev.yaml
+**/values.dev.yaml
+**/build
+**/dist
+LICENSE
+README.md

Dockerfile

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+# syntax=docker/dockerfile:1
+
+# 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/
+
+# Want to help us make this template better? Share your feedback here: https://forms.gle/ybq9Krt8jtBL3iCk7
+
+ARG NODE_VERSION=20.11.1
+
+FROM node:${NODE_VERSION}-alpine
+
+# Use production node environment by default.
+ENV NODE_ENV production
+
+
+WORKDIR /usr/src/app
+
+# 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 port that the application listens on.
+EXPOSE 3000
+
+# Run the application.
+CMD node index.js

README.Docker.md

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+### 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:3000.
+
+### 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/)

compose.yaml

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+services:
+  web-chat:
+    build:
+      context: .
+    environment:
+      NODE_ENV: production
+    ports:
+      - 3000:3000
+
+    depends_on:
+      db:
+        condition: service_healthy
+  db:
+     image: postgres:latest
+     restart: always
+     user: ${PG_USER}
+     volumes:
+       - db-data:/var/lib/postgresql/data
+     environment:
+       - POSTGRES_HOST=${PG_HOST}
+       - POSTGRES_DB=${PG_DATABASE}
+       - POSTGRES_PASSWORD=${PG_PASSWORD}
+     expose:
+       - ${PG_PORT}:5432
+     healthcheck:
+       test: [ "CMD", "pg_isready" ]
+       interval: 10s
+       timeout: 5s
+       retries: 5
+volumes:
+   db-data: