[Feature] Update quick start guide docker compose commands to docker compose v2 (+ minor other improvements)

[michaelkoepf]

Search before asking

• I searched in the issues and found nothing similar.

Motivation

The docker commands in the quick start guide use the old docker compose v1 syntax (docker-compose). Although an alias might be present (docker-compose -> docker compose), we should encourage users to use a recent docker and docker compose version (v1 does not receive updates as of 07/2023).

Solution

Use Compose v2 syntax for docker compose commands (as recommended here)

Additionally:

• Mention a docker version the guide was tested with
• Encourage users to use a recent Docker version and Compose v2
• Split up Flink SQL code blocks that contain multiple commands (Flink SQL CLI only supports one command at a time)
• Verify that the guide works with the new commands

Anything else?

No response

Willingness to contribute

• I'm willing to submit a PR!