Merge pull request #30 from JaivPatel07/main

Update server/index.js

Update server/test/index.test.js

Update server/test/index.test.js

Update server/package.json

Update server/index.js

Update .github/workflows/test.yml

chore: update Node.js version to 22 in test workflow

chore: add devDependencies for testing tools (supertest, vitest)

Update test workflow to use vitest for running tests

Add test instructions to README, implement test scripts, and create test suite

Merge pull request #27 from Vrutik-0/multi-file

Potential fix for pull request finding

Potential fix for pull request finding

Merge branch 'multi-file' of https://github.com/Vrutik-0/OpenDrop into multi-file