docs: improved Docker documentation (#5543)

## Issue being fixed or feature implemented
Make Dash on Docker Hub easier to find, a search on `dash` there does
not provide the result.

## What was done?
Improved Docker documentation in `contrib/containers/README.md`

## How Has This Been Tested?
n/a

## Breaking Changes
n/a

## Checklist:
_Go over all the following points, and put an `x` in all the boxes that
apply._
- [x] I have performed a self-review of my own code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have added or updated relevant unit/integration/functional/e2e
tests
- [x] I have made corresponding changes to the documentation
- [ ] I have assigned this pull request to a milestone _(for repository
code-owners and collaborators only)_
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Pander 2023-09-19 20:26:43 +02:00 committed by GitHub
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This directory contains configuration files for containerization utilities. This directory contains configuration files for containerization utilities.
Currently two Docker containers exist, `ci` defines how Dash's GitLab CI container is built and the `dev` builds on top of the `ci` to provide a containerized development environment that is as close as possible to CI for contributors! Currently two Docker containers exist, `ci` defines how Dash's GitLab CI container is built and the `dev` builds on top of the `ci` to provide a containerized development environment that is as close as possible to CI for contributors! See also [Dash on Docker Hub](https://hub.docker.com/u/dashpay) i.e. for the [dashd container](https://hub.docker.com/r/dashpay/dashd).
### Usage Guide ### Usage Guide