Drupal 8.x

I'm reading the document: https://cgit.drupalcode.org/drupal/tree/core/tests/README.md and I have some questions:

To use nigthwatch I have to install  selenium-server-standalone and chromedriver ?

I have to install node.js inside the drupal directory?

I have to install yarn inside the drupal directory?

In Drupal 8, is there a module out there that could help in this scenario or do I need to develop custom code?    Working on a new site in Drupal 8.

For a banking application, once an user logs in, display a list of view options in a grid.

Based on their selection, present them with a default view that they will see on every login.   Bypassing the view selection screen after first login.

Please advise, thanks!

Is there an active Chef cookbook available to use for standing up / deployment of a Drupal site? Most of the projects that I have found under the Chef supermarket are rather old (i.e. 2015 or older).

I'm curious why the Drupal 8 datetime_range module has both "Date only" and "All Day". Can anyone summarize the reasoning, or point at an issue thread or some such?

We are trying to assess the state of dates in Drupal 8 as we prepare to migrate our D7 site, to try to figure out what's coming and where / how we might be able to contribute to that. It feels like there is a general philosophy at work, but I'm not having much luck figuring it out. (These are bad words to try to search for, matching everything that mentions "all" or "day" ...)

Our custom module have 400+ fields in single configuration(mymodule.settings.yml). While saving configuration via admin backend, these values becomes empty intermittenly. Also when i tried to import these configuration via single item configuration import(admin/config/development/configuration/single/import), I'm getting this error  "Paste your configuration field is required". If i split that configuration(150 fields) and tried to import, it is working. So is there any limitation in configuration?

I have created a custom entity field as follows: