add Dockerfile

docker/Dockerfile

+# From base image node
+FROM node:16
+
+# Create app directory
+RUN mkdir -p /usr/src/app
+WORKDIR /usr/src/app
+
+# Copying all the files from your file system to container file system
+COPY package.json .
+
+# Install all dependencies
+RUN npm install
+
+# Copy other files too
+COPY ./ .
+
+# Expose the port
+EXPOSE 3030
+
+# Command to run app when intantiate an image
+CMD ["npm","start"]