chore(docs): update user management next docs

[avallete]

I have read the CONTRIBUTING.md file.

YES

What kind of change does this PR introduce?

• Simplify and add the dotenv syntax to the config.toml
• Add mention to the branching into the readme.md
• Add bucket storage configuration

What is the current behavior?

Please link any relevant issues here.

What is the new behavior?

Feel free to include screenshots if it includes visual changes.

Additional context

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