feat: Add Spring Boot + Keploy integration sample

[Arpreet2107]

Description

• Added a complete Spring Boot CRUD API with User model
• Included detailed README with setup and Keploy integration instructions
• Follows Maven/Spring Boot conventions for easy adoption

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

1. Manual testing:
   • Verified all endpoints (POST/GET /api/users) using Postman
   • Confirmed health check endpoint works
2. Keploy testing:
   • Recorded test cases using keploy record
   • Validated automated test execution

Test Configuration:

• Java 17
• Spring Boot 3.1.0
• Windows 11

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I have checked my code and corrected any misspellings

[pratik-mahalle]

Hey @Arpreet2107, Thank you for raising the pr! Our team will soon review the changes. Before that please make sure to sign the DCO before commiting the changes

[Arpreet2107]

Can you please brief me about the DCO.

…

On Mon, 23 Jun, 2025, 1:51 pm Pratik Mahalle, ***@***.***> wrote: *pratik-mahalle* left a comment (keploy/samples-java#103) <#103 (comment)> Hey @Arpreet2107 <https://github.com/Arpreet2107>, Thank you for raising the pr! Our team will soon review the changes. Before that please make sure to sign the DCO before commiting the changes — Reply to this email directly, view it on GitHub <#103 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BB3A5UISRUH3Q6EIW3742KT3E62JPAVCNFSM6AAAAAB7T6ZA4KVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDSOJVGQZDMMZTG4> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[pratik-mahalle]

You can read about Developer Certificate Of Origin(DCO) here:
https://cert-manager.io/docs/contributing/sign-off/

[Achanandhi-M]

Hey @Arpreet2107 thanks for raising the PR but currently we dont this quickstart if you are interested please add any other new quickstart which is not used in the keploy quickstart