Add Dockerfile.

Dockerfile

@@ -0,0 +1,20 @@
+# Use Node 16 alpine as parent image
+FROM node:22-alpine
+
+# Change the working directory on the Docker image to /app
+WORKDIR /app
+
+# Copy package.json and package-lock.json to the /app directory
+COPY package.json package-lock.json ./
+
+# Install dependencies
+RUN npm install
+
+# Copy the rest of project files into this image
+COPY . .
+
+# Expose application port
+EXPOSE 3000
+
+# Start the application
+CMD npm run prod