Added Artist, Album, and Song models.

gabigarrero_music/Homepage/models.py

 from django.db import models
 
-# Create your models here.
+class Artist(models.Model):
+    artist_name = models.CharField(max_length = 50) 
+    monthly_listeners = models.IntegerField()
+    
+class Album(models.Model):
+    album_name = models.CharField(max_length = 100)
+    artist = models.ForeignKey(Artist, on_delete = models.CASCADE)
+    description = models.CharField(max_length = 300)
+    release_date = models.DateField()
+    
+class Song(models.Model):
+    song_title = models.CharField(max_length = 100)
+    artist = models.ForeignKey(Artist, on_delete = models.CASCADE)
+    album = models.ForeignKey(Album, on_delete = models.CASCADE)
+    song_length = models.IntegerField()
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