Docker - Build Simple Node JS Webapp docker container

#1 Create the below docker file

 

#2 Create the dependency files

    package.json
    index.js

package.json

   

index.js

 

#3 Build the container

Build the container from the location where all the above 3 files are placed.

 docker build -t testdocker/myfirstweb:v1 .

 

#4 Port binding

 Through the index.js file, we have configured nodeJS to listen to port 8080 i.e; the port 8080 on the container has the app deployed.
To access this port from the local machine, there should be a binding from local machine to docker container, so as to allow the web browser on local machine to access the port 8080 of docker container.
This is done with the help of docker run command.

syntax: docker run -p 8080:8080 testdocker/myfirstweb:v1


#5 Access the test Url from web browser
    http://localhost:8080
         this should print the message
                      Hello My First Web App Container

Screenshots of terminal window and web browser-