Snippet from my Dockerfile:

FROM node:12.18.0
RUN echo "hello world"
RUN psql --version

When I run docker build . I don’t see any output from these two commands even if they are not cached. The documentation says that docker build is verbose by default. Why am I not seeing the output from commands? I used to see them before.

The output while building:

=> [7/18] RUN echo "hello worl"                         0.9s

The output I am seeing after building finishes:

=> CACHED [6/18] RUN apt-get install postgresql -y      0.0s
=> [7/18] RUN echo "HELLO world"                        6.4s
=> [8/18] RUN psql --version                           17.1s

The Dockerfile is created from node:12.18.0 which is based on Debian 9.

Docker version 19.03.13, build 4484c46d9d.

4 Answers
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