Notes on using Docker [Step by Step]

Docker Note

#Docker Installation:

First, add the GPG key for the official Docker repository to the system:
`curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -`
`sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"`
`sudo apt-get update`

Make sure you are about to install from the Docker repo instead of the default Ubuntu 16.04 repo:
`apt-cache policy docker-ce`

Finally, install Docker:
`sudo apt-get install -y docker-ce`

After installation to check the status run:
`service docker status`

Congratulations, You've completed installing docker on your machine.
Now it's time to install images as needed

Create a file called `Dockerfile` in your project directory
Then add following lines on that file.

``
FROM node:9.2 #here the image that you want to go with

# Create app Directory
RUN mkdir -p /usr/src/app
WORKDIR /usr/src/app

# Install app dependencies
COPY package.json /usr/src/app
Run cd /usr/src/app
Run npm install
Run node --version

# Bundle app source
COPY . /usr/src/app

EXPOSE 8585

CMD ["npm", "start"]
``
Now simple hit this command to build your project:
`sudo docker build -t CONTAINER_NAME .`

After the build process now hit this to run:
`sudo docker run  -it -d -p NEW_PORT:EXPOSED_PORT --name THE_NAME_YOU_WANT CONTAINER_NAME_THAT_YOU_WANT_RUN_WITH`

To check running containers:
`sudo docker ps -a`

to stop process docker kill PROCESS_NAME
to delete a process docker rm PROCESS_NAME
to remove a container rmi CONTAINER_NAME

to update automatically without rebuilding everytime run your app like this way
sudo docker run -it  -p 82:8585 -v /home/rakin/dockerg/:/usr/src/app my-kutus

#to open bash of a container inside docker
docker exec -it CONTAINER_NAME bash

#running docker containers in background
docker-compose up -d

#to stop all docker containers (running)
`docker stop $(docker ps -aq)`

#to build from source in local
`docker-compose build`  [Optional flag `--no-cache`]

#building docker tag from current source
docker build -t dockermahbubrahman/mail-for-good:stable .

#pushing this as image to docker hub
docker push  dockermahbubrahman/freecodecamp/mail-for-good:newVersionMahbub

for more visit: https://medium.freecodecamp.org/docker-easy-as-build-run-done-e174cc452599
for more visit: https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-16-04#step-2-%E2%80%94-executing-the-docker-command-without-sudo-(optional)