Update docker.zsh to check if a user is in a docker container

🐟 spacefish-bot — Pull request copied from: https://github.com/denysdovhan/spaceship-prompt/pull/531.

updated to return docker info when /.dockerenv file exists

Description

I'm a heavy docker user and I was embarrassed about I had to create Dockerfile or docker...yml file for all the directories that I have to move around.

When docker container is created, /.dockerenv file is created at the same time. This file would be good for checking whether an user is in docker container

user must connect /usr/var/docker.sock when run the container e.g. docker run -v /usr/var/docker.sock:/usr/var/docker.sock

matchai / spacefish

Update docker.zsh to check if a user is in a docker container #138

Description