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Dockerfile

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+# Use official Node.js LTS image
+FROM node:18
+
+# Create app directory
+WORKDIR /app
+
+# Copy your files into the container
+COPY . .
+
+# Install dependencies (only Express in your case)
+RUN npm install express
+
+# Expose the port your server listens on
+EXPOSE 3000
+
+# Start the server
+CMD ["node", "server.js"]