Docker

Custom Image creation

1. Create a folder "docker-node"

2. Change directory cd docker-node

3. Open VS code here: code .

4. Inside VS code:

   • Open terminal
   • npm init creates package.json
   • npm i express install express and node module gets created.
   • create "main.js" and write the required code.

5. Create a configuration file for image called Dockerfileand write required code

6. convert into image:

   • syntax : docker build -t(tag) imageKaNaam Dockerfile_ka_path
   • docker build -t mera-nodejs-image .

7. Run Image inside container

   • docker run -it imageName
     • it will create the container but data will not be visible through browser
   • now you need to map the container port to local machine port, so that it can be accessible through the browser

   docker run -it -p 8000:8000 imageName

8. docker exec -it containerId bash

   • opens a new bash terminal inside the container whose id is specified in the command.

9. ls

   • list all available files in the container.

10. cat main.js

    • cat show the content of main.js in the command line.