Create Dockerfile

Dockerfile

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+# Use official Node.js LTS image
+FROM node:20-alpine
+
+# Set working directory inside the container
+WORKDIR /app
+
+# Copy package files first (for caching)
+COPY package*.json ./
+
+# Install dependencies
+RUN npm install
+
+# Copy all project files
+COPY . .
+
+# Expose port (change if needed)
+EXPOSE 3000
+
+# Default command (can be overridden)
+CMD ["npm", "start"]