Dockerfile instruction 🦈🍥

Dockerfile is a text file containing various instructions and configurations in the form of commands. Dockerfile helps to build a Docker image.

📝DockerFile Syntax:

`FROM`	:[taking base image from Docker Hub]
`WORKDIR /app`	:[Set the working directory in the container]
`COPY . /app`	:[Copy the current directory contents into the container at /app]
`RUN`	[Install any needed packages specified in requirements.txt for building the image]
`EXPOSE`	[Make port available to the world outside this container]
`CMD`	[Run specified command when the container launches]

📌Task:

✔️The task is to create a Dockerfile for a simple web application.

Create a project directory on your ec-2 instance and clone the git repo where the node-to-do-app source code is present

Fork this repository to get started:https://github.com/surajc5/node-todo-cicd.git

✔️Build the image using the Dockerfile and run the container

-Write a Docker file in the project directory to build a Docker image for the application

-Docker file created then Build the image using Dockerfile

💡

1. Must be Install docker in your system using

💡

2. Must grant access to the user they want to use to interact with docker and run docker commands.

💡

If still facing the same grant permission error then Reboot the system

-Built docker image by running the command docker build . -t <tag-name>

-To create a container from docker Image, run the command :
[docker run -d -p 8000:8000 node-todo-app:latest]

-To check the running container [ docker ps -a]

✔️Verify that the application is working as expected by accessing it in a web browser

-As we can see that port 8000 running so ,go to ec2 Instance and acess the 8000 given as follows

BOOM✨🎇🎇✨🎇🎇✨ BOOM🎉🎉

✔️Push the image to a public or private repository (e.g. Docker Hub )

Before pushing image from the source to the destination or docker hub u need to modify the image name with dockerhubuser name /new name

  #sudo docker tag <Exiting images name > dockhubUsername/New Image name
  Sudo docker tag node-todo-app surajdev5/node-todo-app

-Login into your docker registry using docker login command from the ec2 instance

-Push your image to the docker hub:

✔️Let's see how to push the image to a public or private repository (e.g. Docker Hub )

BOOM✨🎇🎇✨🎇🎇✨ BOOM🎉🎉

Thanks for reading my article. Have a nice day. Happy Learning:)😊😊

Docker Project for DevOps Engineers part-II

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