Routes

/upload [POST]

The request must contain :
    1. Music File (name: "music")
    2. Thumbnail Image file (name: "thumbnail");
    3. Song Information (
        body: {
            music: {
                title: "title-input",
                artist: "artist-input",
                user: "username",
                uid: "uid-from-firebase",
                duration: "duration-of-song"

            }
        }

    )

/toggle-song-like

The request must contain :
    1. Song's mongo ID
    2. User's mongo ID
The response is 1 for successful toggle and 0 for unsuccessful(String)