Missing details in symfony-docs/configuration/micro_kernel_trait.rst

[olberger]

The "Building your own Framework with the MicroKernelTrait" article misses a few details so that it works "out of the box".

Here's a list of some I've spotted:

• The php -S should be issued inside web/
• an example app/Resources/views/micro/random.html.twig could be provided

Hope this helps.

Best regards,

[dominikhajduk]

@olberger proposed PR with missing views #7568

[dominikhajduk]

Proposed also PR for first mentioned issue #7570

[dominikhajduk]

@olberger @xabbuh as both points are described now I think issue can be close.