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See
https://medium.com/viascom/enabling-https-in-spring-boot-3-c94095389842
https://www.cloudflare.com/zh-cn/learning/ssl/what-is-ssl/
https://docs.spring.io/spring-boot/reference/features/ssl.html#features.ssl
https://spring.io/blog/2023/06/07/securing-spring-boot-applications-with-ssl
https://datatracker.ietf.org/doc/html/rfc8446
https://stackoverflow.com/questions/3867019/what-are-the-merits-of-jks-vs-pkcs12-for-code-signing