Refs #37102 - filter out webpack host argument

Fixes #37102 - webpack 5

Fixes #32437 - Use webpack-dev-server-without-h2

Looks like webpack-dev-server version 2.x
can't support https without http2 due to missing options
when using command line parameters,
this is an hack that will prevent manually removing a line
after each `npm install` and will give us some air...

Fixes #27074 - Migrate to @theforeman/vendor pkg

Fixes #16160 - added start-foreman-dev helper

Fixes #16074 - Adds BIND variable to startup process

Instead of binding to 0.0.0.0 we default to localhost
and use ENV variable BIND to override.
This also introduces '.env' files which helps to set
other ENV variables

Refs #12364 - webpack server can serve assets on https

Refs #12364 - Allow running webpack dev server on any hostname

Currently, SecureHeaders only allows running the webpack dev server from
localhost or 0.0.0.0, and only using http. This leads to issues when
attempting to run foreman inside a virtual machine or using https. This...

Fixes #12364 - Use NPM+Webpack to handle external assets

This commit introduces NPM and Webpack to handle external assets.
It also provides ES6 support and a live reload dev server that can be
used by running `foreman start` instead of `rails start`.
Do not forget to run `npm install` before starting the server....