Add Cloud Tour Libo knowledge graph platform

.env.example

@@ -37,6 +37,11 @@ INGEST_API_KEYS=dev-key-1
 AMAP_WEB_KEY=
 AMAP_JS_KEY=
 AMAP_SECURITY_JSCODE=
+
+# 阿里云 OCR (RecognizePassport 等), optional
+ALIYUN_OCR_ACCESS_KEY_ID=
+ALIYUN_OCR_ACCESS_KEY_SECRET=
+ALIYUN_OCR_ENDPOINT=ocr-api.cn-hangzhou.aliyuncs.com
 GAODE_CRAWLER_PATH=
 TRAVEL_KG_DATA_ROOT=./data
 TRAVEL_AGENCY_SOURCE_ROOT=./data/source/travel_agency