Dockerfile text file usage example analysis

Dockerfile is a text file used to build an image. The text content contains the instructions and instructions required to build the image.

Docker supports the rapid creation of custom images

Dockerfile common commands

Create a Dockerfile directory in the directory, and then create a Dockerfile text file in it. Be careful not to bring .txt

File Contents

FROM nginx
RUN echo 'This is a locally built nginx image' > /usr/share/nginx/html/index.html

Docker can just enter this directory and execute the command

Use at this time

docker images

You can see the version of the image just created

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