[ENDPOINT] /
[GET] https://api-holidays-id.rizkysam.web.id/
[ENDPOINT] /holidays/:year
[GET] https://api-holidays-id.rizkysam.web.id/holidays/2021
API Indonesia Public Holidays
[ENDPOINT] /
[GET] https://api-holidays-id.rizkysam.web.id/
[ENDPOINT] /holidays/:year
[GET] https://api-holidays-id.rizkysam.web.id/holidays/2021