List out all INSTRUCTION statement of dockerfile and give one line explanation. – Draft
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Dockerfile commands
| DOCKER file Commands | Details | |
| 1 | FROM | Taking the base image |
| 2 | MAINTAINER | Creater of the dockerfile |
| 3 | RUN | Run command in the container of the previous layer |
| 4 | ARG | Set a variable for the dockerfile and reuse it ${var}. Scope is only during the building process. |
| 5 | EXPOSE | Specifying information port for the container |
| 6 | COPY | Copy the files to the image |
| 7 | ADD/EXTRACT | Extract + Copy compressed files to the image |
| 8 | USER | Set a container the runtime user. |
| 9 | CMD | To set PID 1 |
| 10 | ENTRYPOINT | To set PID 1 |
| 11 | ENV | For setting the environment variable in the container. |
| 12 | VOLUME | Create or mount a volume to the docker contanier from the docker host file system. |
| 13 | WORKDIR | Sets the working directory or context inside the image we are building. |
| 14 | ONBUILD | For specifying the command to run when the image in the docker file is used as the base image for another docker image. |