Update Dockerfile

Dockerfile

@@ -1,32 +1,18 @@
-# from official image
-FROM ubuntu:18.04
+FROM node:18
 
-# key-value pairs
-# allow more than one
-#
-LABEL version="1.0"
+# Create app directory
+WORKDIR ./
 
-# install package
-RUN apt-get update
-RUN apt-get install -y curl sudo
-RUN curl -sL https://deb.nodesource.com/setup_16.x | sudo -E bash -
-RUN apt-get install -y nodejs
+# Install app dependencies
+# A wildcard is used to ensure both package.json AND package-lock.json are copied
+# where available (npm@5+)
+COPY package*.json ./
 
-# set working directory to /app
-WORKDIR /app
-
-# copy index.js from current directory into the container at /app
-COPY . /app
-
-# install need packages specified in package.json
 RUN npm install
+# If you are building your code for production
+# RUN npm ci --omit=dev
 
-# expose port 7860 for acessing the app
+# Bundle app source
+COPY . .
 EXPOSE 7860
-
-# This allows Heroku bind its PORT the Apps port
-# since Heroku needs to use its own PORT before the App can be made accessible to the World
-EXPOSE $PORT
-
-# run app when container launches
-CMD ["node", "app.js"]
+CMD [ "node", "app.js" ]