feat(shows): add uploaded show images

backend/shows/models.py

@@ -16,6 +16,7 @@ class Show(TimeStampedModel):
     summary = models.TextField(blank=True)
     description = models.TextField(blank=True)
     poster_image = models.URLField(blank=True)
+    uploaded_image = models.ImageField(upload_to="shows/", blank=True)
     is_published = models.BooleanField(default=False, db_index=True)
 
     class Meta:
@@ -28,6 +29,14 @@ class Show(TimeStampedModel):
     def __str__(self):
         return self.title
 
+    def image_url(self, request=None):
+        if self.uploaded_image:
+            image_url = self.uploaded_image.url
+            if request is not None:
+                return request.build_absolute_uri(image_url)
+            return image_url
+        return self.poster_image
+
 
 class Venue(TimeStampedModel):
     name = models.CharField(max_length=200)