add azure flag disable file sync

Author: amuta

config/deploy.staging.yml

@@ -31,6 +31,7 @@ env:
     AWS_DEFAULT_REGION: us-east-1
     AWS_BUCKET_NAME: skillrx-staging
     AZURE_STORAGE_SHARE_NAME: skillrx-staging-env
+    AZURE_MEDIA_FILES_SYNC_DISABLED: "true"
     AWS_ENDPOINT_URL: ""  # Empty for real AWS
     LOCALSTACK_DEBUG: "0"
     S3_SKIP_SIGNATURE_VALIDATION: "0"