Add base devise framework for authentication. [#82350724]
Use .env file for config parameters. [#82350724]
add is_admin flag to members table, and seeded admin. [#82350724]
Add devise inviteable model so we can send invitations when members sign up. [#82350724]
modify integration tests to support devise authentication. [#82350724]
hook devise invitable in to member create method. [#82350724]