Improve the JPA bootstrapping section in the User Guide

Description

The JPA bootstrapping section does not offer an example of how the `persistence.xml` should be used.

On the other hand, it mentions a way to bootstrap without the `persistence.xml`, which relies on an internal class that might change in future. That needs to be addressed as well.

Environment

None

Status

Assignee

Vlad Mihalcea

Reporter

Vlad Mihalcea

Fix versions

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backPortable

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Suitable for new contributors

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Requires Release Note

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Pull Request

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backportDecision

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Components

Priority

Major
Configure