Spring Boot Code Review

Today I push a Spring Boot + security rest API app for resume builder on Github. It will be kind if someone examines my code and raise issues. I want to discover more where I can update my code to make it better. Here you can find my code on GitHub: https://github.com/Ayushnita/Resume_builder
Thanks in advance for looking out my silly mistakes.
Please Raise issues for any mistake you found, it will be helpful for me to learn more.
Thanks.

原文链接：Spring Boot Code Review