https://blog.naver.com/PostView.naver?blogId=sssang97&logNo=222431994969&parentCategoryNo=&categoryNo=348&viewDate=&isShowPopularPosts=false&from=postView
https://esbook.kimjmin.net/06-text-analysis/6.6-token-filter/6.6.4-ngram-edge-ngram-shingle
https://wonyong-jang.github.io/elk/2021/02/08/ELK-Elastic-Search4.html
https://jomuljomul.tistory.com/entry/ElasticSearch-%EC%A0%95%EB%A6%AC%ED%95%98%EA%B8%B0-Full-Text-Search-%EC%A2%85%EB%A5%98
https://velog.io/@hanblueblue/Elastic-Search-2