Make it clear that docker ps filter name accepts regular expressions

[watery]

Problem description

Docker ps command filtering option allows using regular expressions in its name parameter, while by the docs by it seems only strings are allowed and that it:

matches on all or part of a container’s name

Problem location

• I saw a problem on the following URL: https://docs-stage.docker.com/engine/reference/commandline/ps/#name

Project version(s) affected

I already checked this on 19.03.11, where I have two identically prefixed containers:

• app
• app_stage

Here

docker ps -a --filter name=app

returns both, while:

docker ps -a --filter name=^app$ 

only returns the first one.

Suggestions for a fix

Clarify that, at least for the name filter option, a regular expression may be specified.
I learned that from this comment.

[docker-robott]

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[watery]

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