What is the method for building images using a Dockerfile?

The Dockerfile is a text file used to automate the building of Docker images. You can build images using the following methods:

1. Create a Dockerfile: generate a file named Dockerfile in the root directory of the project.
2. Write a Dockerfile: In the Dockerfile, write the instructions needed to build the image. Instructions include selecting the base image, copying files, installing dependencies, exposing ports, etc.
3. Build image: Use the `docker build` command to build an image. The command format is: `docker build -t `. For example: `docker build -t myimage .`
4. Waiting for the build to finish: Docker will gradually build the image according to the instructions in the Dockerfile, and generate the final image.
5. Run the image: Use the docker run command to run the built image. The command format is: docker run -p : . For example: docker run -p 8080:80 myimage.

The above steps are commonly used for building images, and additional instructions and configurations can be added to the Dockerfile based on actual requirements.