saissemet/Create and push a Docker image from scratch

## Create and push a Docker image from scratch
## In this tutorial we are creating a simple Apache2 docker image. The main ideia is to create and push a docker image from scratch. ##

## Creating a local directory to store the configuration files ##
mkdir myapp
cd myapp

## Creating a "Dockerfile" with the following content ##
nano Dockerfile

FROM ubuntu:18.04
MAINTAINER saissemet
RUN apt-get update && apt-get install -y apache2 && apt-get clean && rm -rf /var/lib/apt/lists/*
ENV APACHE_RUN_USER  www-data
ENV APACHE_RUN_GROUP www-data
ENV APACHE_LOG_DIR   /var/log/apache2
ENV APACHE_PID_FILE  /var/run/apache2/apache2.pid
ENV APACHE_RUN_DIR   /var/run/apache2
ENV APACHE_LOCK_DIR  /var/lock/apache2
ENV APACHE_LOG_DIR   /var/log/apache2
RUN mkdir -p $APACHE_RUN_DIR
RUN mkdir -p $APACHE_LOCK_DIR
RUN mkdir -p $APACHE_LOG_DIR
COPY index.html /var/www/html
EXPOSE 80
CMD ["/usr/sbin/apache2", "-D", "FOREGROUND"]

## Creating a "index.html" with the following content ##
nano index.html

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Padre Messias II</title>
</head>
<body>
<h1>"Don't play, pray!" - Padre Messias II</h1>
</body>
</html>

## Update and upgrade the O.S.'s software ##
apt update && apt upgrade -y

## Installing docker ##
apt install docker.io

## Building the docker image. ##
## The name you choose in this step is'nt the one you will use to push your image ##
docker build -t [DOCKER_IMAGE_NAME] .

## Testing the image. ##
## The '-d' variable runs the container in the background. ##
## You can change the first port of the command. The second is the one the images uses. ##
docker run -d -p 80:80 [DOCKER_IMAGE_NAME]

## At this point, you should be able to open a browser page with your IP and see a html page ##

## Now we are moving on to push the image we just created. To start, you need to set up an account at the DockerHub (https://hub.docker.com/) ##
## After that, you can get back to the command line ##

## Login your DockerHub account ##
docker login

## Check you docker images and grab the image ID ##
docker images

## Tag your image. This tag will be used to push and pull your image. ##
docker tag [IMAGE_ID] [USERNAME]/[SOME_RANDOM_NAME]:[SOME_COOL_TAG]

## Push your image to the DockerHub repository ##
docker push [USERNAME]/[SOME_RANDOM_NAME]:[SOME_COOL_TAG]

## To test, go to some other computer and try this. ##

## Pull the docker image ##
docker pull [USERNAME]/[SOME_RANDOM_NAME]:[SOME_COOL_TAG]

## Run the docker image and check if it's working ##
## The '-d' variable runs the container in the background. ##
## You can change the first port of the command. The second is the one the images uses. ##
docker run -d -p 80:80 [USERNAME]/[SOME_RANDOM_NAME]:[SOME_COOL_TAG]
	## In this tutorial we are creating a simple Apache2 docker image. The main ideia is to create and push a docker image from scratch. ##

	## Creating a local directory to store the configuration files ##
	mkdir myapp
	cd myapp

	## Creating a "Dockerfile" with the following content ##
	nano Dockerfile

	FROM ubuntu:18.04
	MAINTAINER saissemet
	RUN apt-get update && apt-get install -y apache2 && apt-get clean && rm -rf /var/lib/apt/lists/*
	ENV APACHE_RUN_USER www-data
	ENV APACHE_RUN_GROUP www-data
	ENV APACHE_LOG_DIR /var/log/apache2
	ENV APACHE_PID_FILE /var/run/apache2/apache2.pid
	ENV APACHE_RUN_DIR /var/run/apache2
	ENV APACHE_LOCK_DIR /var/lock/apache2
	ENV APACHE_LOG_DIR /var/log/apache2
	RUN mkdir -p $APACHE_RUN_DIR
	RUN mkdir -p $APACHE_LOCK_DIR
	RUN mkdir -p $APACHE_LOG_DIR
	COPY index.html /var/www/html
	EXPOSE 80
	CMD ["/usr/sbin/apache2", "-D", "FOREGROUND"]

	## Creating a "index.html" with the following content ##
	nano index.html

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<title>Padre Messias II</title>
	</head>
	<body>
	<h1>"Don't play, pray!" - Padre Messias II</h1>
	</body>
	</html>

	## Update and upgrade the O.S.'s software ##
	apt update && apt upgrade -y

	## Installing docker ##
	apt install docker.io

	## Building the docker image. ##
	## The name you choose in this step is'nt the one you will use to push your image ##
	docker build -t [DOCKER_IMAGE_NAME] .

	## Testing the image. ##
	## The '-d' variable runs the container in the background. ##
	## You can change the first port of the command. The second is the one the images uses. ##
	docker run -d -p 80:80 [DOCKER_IMAGE_NAME]

	## At this point, you should be able to open a browser page with your IP and see a html page ##

	## Now we are moving on to push the image we just created. To start, you need to set up an account at the DockerHub (https://hub.docker.com/) ##
	## After that, you can get back to the command line ##

	## Login your DockerHub account ##
	docker login

	## Check you docker images and grab the image ID ##
	docker images

	## Tag your image. This tag will be used to push and pull your image. ##
	docker tag [IMAGE_ID] [USERNAME]/[SOME_RANDOM_NAME]:[SOME_COOL_TAG]

	## Push your image to the DockerHub repository ##
	docker push [USERNAME]/[SOME_RANDOM_NAME]:[SOME_COOL_TAG]

	## To test, go to some other computer and try this. ##

	## Pull the docker image ##
	docker pull [USERNAME]/[SOME_RANDOM_NAME]:[SOME_COOL_TAG]

	## Run the docker image and check if it's working ##
	## The '-d' variable runs the container in the background. ##
	## You can change the first port of the command. The second is the one the images uses. ##
	docker run -d -p 80:80 [USERNAME]/[SOME_RANDOM_NAME]:[SOME_COOL_TAG]