[NU-1616] Docker Compose based installation example

[mk-software-pl]

Describe your changes

• example installation of Nu ecosystem (it's not a production setup)

Running:

docker compose up -d --build

or

./run.sh

Cleaning:

docker compose down -v

or

./clean.sh

Checklist before merge

• Related issue ID is placed at the beginning of PR title in [brackets] (can be GH issue or Nu Jira issue)
• Code is cleaned from temporary changes and commented out lines
• Parts of the code that are not easy to understand are documented in the code
• Changes are covered by automated tests
• Showcase in dev-application.conf added to demonstrate the feature
• Documentation added or updated
• Added entry in Changelog.md describing the change from the perspective of a public distribution user
• Added MigrationGuide.md entry in the appropriate subcategory if introducing a breaking change
• Verify that PR will be squashed during merge

[arkadius]

LGTM