update to docker

Dockerfile

@@ -0,0 +1,20 @@
+# Use an official Node runtime as the parent image
+FROM node:18
+
+# Set the working directory in the container
+WORKDIR /usr/src/app
+
+# Copy package.json and package-lock.json
+COPY package*.json ./
+
+# Install dependencies
+RUN npm install
+
+# Copy the rest of your app's source code
+COPY . .
+
+# Your app binds to port 3000 so you'll use the EXPOSE instruction to have it mapped by the docker daemon
+EXPOSE 3000
+
+# Define the command to run your app
+CMD [ "node", "index.js" ]