(refact) home, signout: Change messages
(refact) CSS: Clean up CSS
Merge pull request #61 from alexanderGugel/refact/ux

(refact) home, signout: Change messages
Merge pull request #62 from alexanderGugel/refact/css

(refact) CSS: Clean up CSS
(fix) Add missing word
Merge pull request #63 from alexanderGugel/fix/typo

(fix) Add missing word
Refactor initial Firebase route so that security rules will be easier