Update Dockerfile

Dockerfile

@@ -1,27 +1,32 @@
-FROM node:18
+# from official image
+FROM ubuntu:18.04
 
-# Set up a new user named "user" with user ID 1000
-RUN useradd -o -u 1000 user
+# key-value pairs
+# allow more than one
+#
+LABEL version="1.0"
 
-# Switch to the "user" user
-USER user
+# 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
 
-# Set home to the user's home directory
-ENV HOME=/home/user \
-	PATH=/home/user/.local/bin:$PATH
+# set working directory to /app
+WORKDIR /app
 
-# Set the working directory to the user's home directory
-WORKDIR $HOME/app
-
-# Install app dependencies
-# A wildcard is used to ensure both package.json AND package-lock.json are copied
-# where available (npm@5+)
-COPY --chown=user package*.json $HOME/app
+# copy index.js from current directory into the container at /app
+COPY . /app
 
+# install need packages specified in package.json
 RUN npm install
 
-# Copy the current directory contents into the container at $HOME/app setting the owner to the user
-COPY --chown=user . $HOME/app
-
+# expose port 7860 for acessing the app
 EXPOSE 7860
-CMD [ "npm", "run", "start" ]
+
+# 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"]