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wip: rewrite di chapter

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09-dependency-injector.md
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@ -2,6 +2,16 @@
### Dependency Injector
In the last chapter we rewrote our Actions to require the response-objet as a constructor parameter, and provided it
in the dispatcher section of our `Bootstrap.php`. As we only have one dependency this works really fine, but if we have
different classes with different dependencies our bootstrap file gets complicated quite quickly. Lets look at an example
to explain the problem and work on a solution.
#### Adding a clock service
Lets assume that we want to show the current time in our Hello action. We could easily just call use one of the many
ways to get the current time directly in the handle-method, but maybe we want to make that configurable and
A dependency injector resolves the dependencies of your class and makes sure that the correct objects are injected when
the class is instantiated.