Update application readme - Closes #2974

[michielmulders]

What was the problem?

Outdated instructions.

How did I fix it?

Update accordingly.

Review checklist

• The PR resolves Update running application instructions in readme #2974
• All new code is covered with unit tests
• All new code was formatted with Prettier
• Linting passes
• Tests pass
• Commit messages follow the commit guidelines
• Documentation has been added/updated

[yatki]

Just 2 minor comments.

[michielmulders]

Validate --config option if it works with custom config and other options in readme.

[michielmulders]

Verified if following CLI argumens are being picked up when starting app with npm start -- [options].
-p [port] -> ✅(Modified commander code as property was not being passed - included in this PR)
-a [address] -> ✅
-c [config-path] -> ✅
-n [network] -> ✅