如何在Dockerfile中组合ENV语句？

Question

As an exameple with the RUN statement, if my code is:

RUN apt-get update
RUN apt-get install git
RUN apt-get clean

I can do:

RUN apt-get update && apt-get install git && apt-get clean

If my ENV is:

ENV POSTGRES_PASSWORD postgres
ENV POSTGRES_USER postgres
ENV POSTGRES_DB postgres
ENV POSTGRES_HOST db

How can I combine ENV statement in one line?

Answer 1

Example from the Dockerfile reference

https://docs.docker.com/engine/reference/builder/#env

ENV myName="John Doe" myDog=Rex\ The\ Dog \
    myCat=fluffy