How to build an image from Dockerfile?

To build a Docker image from a Dockerfile, you can follow these steps:

Open a terminal or command prompt and navigate to the directory where your Dockerfile is located.

Run the following command: docker build -t <image_name> .

The docker build command is used to build a Docker image, and the -t flag is used to give the image a name. The . at the end of the command tells Docker to use the current directory as the build context.

For example, if your Dockerfile is located in a directory called myapp, and you want to name the image myapp-image, you would run the following command:

docker build -t myapp-image myapp

Docker will start building the image based on the instructions in your Dockerfile. It will download any necessary dependencies and packages and execute any commands specified in the Dockerfile.

Once the build process is complete, you can verify that the image was created by running the docker images command. This will show a list of all the Docker images on your system, including the one you just built.

That's it! You have successfully built a Docker image from a Dockerfile. You can now use this image to create and run Docker containers.