SDK-1555: Allow empty iframe environment variable

Author: MrBurtyyy

examples/doc-scan/settings.py

@@ -12,7 +12,8 @@
 if YOTI_CLIENT_SDK_ID is None or YOTI_KEY_FILE_PATH is None:
     raise ValueError("YOTI_CLIENT_SDK_ID or YOTI_KEY_FILE_PATH is None")
 
-YOTI_DOC_SCAN_IFRAME_URL = environ.get(
-    "YOTI_DOC_SCAN_IFRAME_URL", "https://api.yoti.com/idverify/v1/web/index.html"
-)
+YOTI_DOC_SCAN_IFRAME_URL = environ.get("YOTI_DOC_SCAN_IFRAME_URL", "")
+if YOTI_DOC_SCAN_IFRAME_URL == "":
+    YOTI_DOC_SCAN_IFRAME_URL = "https://api.yoti.com/idverify/v1/web/index.html"
+
 YOTI_APP_BASE_URL = environ.get("YOTI_APP_BASE_URL", "http://localhost:5000")