All fallbacks added to the login site. Edited voting.html

.gitignore:
    - added the /logs folder to the gitignore

VotingController.java:
    - added log message logging false entry format

Candidate.java:
    - return type changed from 'String' to 'Candidate'

wrongEmail.html:
    - added html file to avoid error

voting.html:
    - changed the way of output

.gitignore

@@ -31,3 +31,4 @@ build/
 
 ### VS Code ###
 .vscode/
+*.log