add log for upload file

apps/core/s3_uploader.py

 import boto3
+import logging
 
 from django.conf import settings
 
 
+log = logging.getLogger('send_video_to_s3')
+
+
 def upload_file(content, key, content_type):
+    log.info(f'Uploading file {key} to S3...')
+
     s3 = boto3.client(
         's3',
         aws_access_key_id=settings.AWS_ACCESS_KEY_ID,
@@ -17,6 +23,7 @@ def upload_file(content, key, content_type):
         Body=content,
         ContentType=content_type,
     )
+    log.info(f'File {key} uploaded to S3...')
 
     return key