My own Docker image

My own Docker image

Here is the format of the Dockerfile:

# Comment
INSTRUCTION arguments

The instruction is not case-sensitive. However, convention is for them to be UPPERCASE to distinguish them from arguments more easily.

Docker runs instructions in a Dockerfile in order. A Dockerfile must start with a `FROM` instruction. The FROM instruction specifies the Base Image from which you are building. 

Parser directives (e.g. "# directive=value") are optional, and affect the way in which subsequent lines in a Dockerfile are handled. 

Parser directives are written as a special type of comment in the form "# directive=value". 

A single directive may only be used once.

See more at https://docs.docker.com/engine/reference/builder/

Examples:

1.

FROM microsoft/nanoserver
COPY testfile.txt c:\\
RUN dir c:\

2.

FROM busybox
ENV foo /bar
WORKDIR ${foo}   # WORKDIR /bar
ADD . $foo       # ADD . /bar
COPY \$foo /quux # COPY $foo /quux

Environment variables are supported by the following list of instructions in the Dockerfile:

• ADD
• COPY
• ENV
• EXPOSE
• FROM
• LABEL
• STOPSIGNAL
• USER
• VOLUME
• WORKDIR

See more:

https://spring.io/guides/gs/spring-boot-docker/
https://spring.io/guides/topicals/spring-boot-docker/