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Dockerfile ＞Docker Image ＞ Docker Container | Beginners Hands-On | Step by Step

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Published on Apr 23, 2024 This response is partially generated with the help of AI. It may contain inaccuracies.

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Step-by-Step Tutorial: Creating a Dockerfile, Docker Image, and Docker Container

Step 1: Creating a New Directory

Open your terminal or command prompt.
Create a new directory using the command mkdir myapp (you can replace "myapp" with any preferred name).
Change directory to the newly created directory using cd myapp.

Step 2: Creating an HTML File

Inside the "myapp" directory, create an HTML file named index.html with the content "Hello World" using the command echo "Hello World" > index.html.

Step 3: Creating a Dockerfile

Create a Dockerfile in the "myapp" directory using the command touch Dockerfile.
Edit the Dockerfile by adding the following content:
```
FROM nginx
COPY index.html /usr/share/nginx/html
```
Save and exit the editor.

Step 4: Building a Docker Image

Start Docker if not already running using sudo service docker start.
Build the Docker image using the command docker build -t myapp ..

Step 5: Running a Docker Container

Run the Docker container from the image using the command:
```
docker run -p 8080:80 myapp
```
Access the application in a web browser by navigating to http://localhost:8080 or using the public IPv4 address if running on a remote server.

Additional Notes:

To run the Docker container in detached mode, add the -d flag to the docker run command.
Ensure proper security group settings in AWS for inbound rules to allow traffic on port 8080 or port 80.
Make necessary adjustments based on the operating system you are using (Linux, Mac, Windows) for running Docker.

Congratulations! You have successfully created a Dockerfile, built a Docker image, and ran a Docker container with a basic web application.

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