[frontend] Add configurations for production and development

Signed-off-by: Jorge Cuadrado <kuadrosxx@gmail.com>
Merge remote-tracking branch 'origin/master' into ui
Show welcome page when there is not users

- Implements users factory
- Creates welcome page

Signed-off-by: Jorge Cuadrado <kuadrosxx@gmail.com>
Update compiled files

Signed-off-by: Jorge Cuadrado <kuadrosxx@gmail.com>