Add Dockerfile manually

Dockerfile

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+# Use the official lightweight Node image
+FROM node:lts-alpine
+
+# Set the working directory inside the container
+WORKDIR /app
+
+# Copy package config files and install dependencies
+COPY package*.json ./
+RUN npm install
+
+# Copy the rest of your server code
+COPY . .
+
+# Expose Hugging Face's mandatory port
+EXPOSE 7860
+
+# Command to start your Express server
+CMD ["node", "server.js"]