As an user I want to login to the webapp

Tasks

• Create new page that is public accessible with the route /login
• Login interface
• Input validation (should have something like firstname.lastname@domain.tld)
• Error message on validation error or error response from server
• User response after submit credentials
  • If credentials correct redirect to main page /
• Store jwt token
• Check validity of jwt token.
  • if its expired redirect to login page
  • if its valid and the user wants to open /login redirect him to /