small changes+ dokcer file added (NOT WORKING)

small changes
dockerfile added but its not working

Dockerfile

@@ -0,0 +1,20 @@
+# Use a Node.js base image with npm pre-installed
+FROM node:alpine
+
+# Set the working directory
+WORKDIR /app
+
+# Copy package.json and package-lock.json
+COPY package*.json ./
+
+# Install dependencies
+RUN npm install
+
+# Copy the rest of the application code
+COPY . .
+
+# Expose the port your app will listen on
+EXPOSE 3000
+
+# Start the app
+CMD ["node", "index.js"]