How to Create a Simple Docker Image from a Dockerfile and Run It?| S-Logix

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How to Create a Simple Docker Image from a Dockerfile and Run It?

Docker

Condition for Create a Simple Docker Image from a Dockerfile and Run It

Description:
This task helps you to create a Docker image using a basic Dockerfile that prints “Hello Docker!” when run. This demonstrates the process of creating, building, and running a custom Docker image.

Steps

Step 1 — Create a Project Folder
Description: Make a folder to store your Dockerfile and related files.
Command:
```
mkdir docker-demo
cd docker-demo
```
Step 2 — Create Dockerfile
Description: Create a Dockerfile with instructions for the image.
Command:
```
nano Dockerfile
```
Dockerfile content to paste inside nano:
```
FROM alpine
CMD ["echo", "Hello Docker!"]
```
Save and exit: CTRL+O → Enter → CTRL+X
Step 3 — Build Docker Image
Description: Build the Docker image from the Dockerfile and give it a name.
Command:
```
docker build -t hello-docker .
```
-t hello-docker → assigns a name to the image
. → build from the current folder
Step 4 — Run the Docker Image
Description: Start a container using the image to see the output.
Command:
```
docker run hello-docker
```
Step 5 — Verify Output
Description: Check that the container prints the expected message.
Expected Output:
```
Hello Docker!
```

Screenshots

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