server-util-logger test

[mingxin0607]

#1220
Add test cases for packages/server/src/utils/logger.ts

Run with:

npx ts-node packages/server/test/utils/logger.test.ts

Output:

Running Test: Should call next() for a valid API call
next() called

[HenryHengZJ]

thank you @mingxin0607 !

can we avoid having console log? and from the test file we mock the req and response, but I think we should use jest expect to correctly test it. Something like: https://stackoverflow.com/a/60723123

Reference PR - https://github.com/FlowiseAI/Flowise/pull/2485/files