Table of contents
💎 Task:
💎 Create a Dockerfile for a simple web application (e.g. a Node.js or Python app)
🔶 First, you'll need to create a Dockerfile. This file contains instructions for building a Docker image. You can use the vi text editor to create a file named Dockerfile (no file extension) and define the instructions within it. Here's an example Dockerfile for a basic web application:
💎 Build the image using the Dockerfile and run the container.
🔶 Open a terminal or command prompt, navigate to the directory containing your Dockerfile, and run the following command to build the Docker image.
docker build. -t <name of image>
🔶 Run the Docker Container: After building the Docker image, you can run a container from it using the following command.
docker run -d -p 5000:5000 <your_image_name>:<your_image_tag>
--namespecifies the name you want to give to the container.-pmaps port 5000 inside the container to port 5000 on your host machine. You can change the port mapping as needed.
💎 Verify that the application is working as expected by accessing it in a web browser
🔶 Once the container is running, you can access the application in a web browser by entering http://localhost or the IP address of your host machine, depending on your Docker setup and the application's configuration.
💎 Push the image to a public or private repository (e.g. Docker Hub )
🔶 Log In to Docker Hub: If you haven't already, log in to your Docker Hub account using the docker login command:
🔶 Tag your Docker image with your Docker Hub username, the repository name, and the tag you want (e.g., latest):
🔶 Replace your-image-name with your image's name, your-docker-hub-username with your Docker Hub username, and your-repository-name with the desired repository name on Docker Hub.
🔶 Push the tagged image to Docker Hub. This will upload your image to your public Docker Hub repository.
docker push your-docker-hub-username/your-repository-name:latest
🔶 Visit the Docker Hub website and log in to your account to verify that your image has been successfully pushed and is accessible to the public.
