Helm Chart inconsistencies

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The Helm Chart or at least its documentation is inconsistent both with the rest of the documentation and in itself.

For example, `9002` is given as both the Appservice Port and the Widget Listener Port, when only the latter seems to be correct.

Much of this can be alleviated if templating was properly used, e.g. the same value for this port would be only defined exactly once in values.yml and then be used in any relevant places in the templates.

Start by locating the Helm chart, its values.yml, and the templates that define the Appservice and Widget Listener ports. Compare those values with the project documentation and check where repeated settings can be consolidated. Done means the chart, templates, and documentation consistently describe the correct ports and shared values are defined once.

Written by the indexing model from the issue text.