Add background music; add favicon; add sound module

src/utils/constants.ts

@@ -3,3 +3,4 @@ export const LOADING_DURATION = 800
 export const PREVIEW_WIDTH = 320
 export const PREVIEW_HEIGHT = 180
 export const UI_SOUND_VOLUME = 0.2
+export const UI_MUSIC_VOLUME = 1

src/utils/index.ts

@@ -3,6 +3,7 @@ import { LOADING_DURATION } from './constants'
 export {
 	PREVIEW_WIDTH,
 	PREVIEW_HEIGHT,
+	UI_MUSIC_VOLUME,
 	UI_SOUND_VOLUME,
 	LOADING_DURATION,
 	ANIMATION_DURATION