fix sample not works

[JaredTan95]

fix ui dir cloud not be loaded and certs file path in sample server.

[codecov[bot]]

Codecov Report

Attention: 129 lines in your changes are missing coverage. Please review.

Files	Coverage Δ
client/httpclient.go	95.31% <100.00%> (+0.57%)	:arrow_up:
client/internal/clientcommon.go	80.47% <100.00%> (+0.67%)	:arrow_up:
client/internal/receivedprocessor.go	72.60% <100.00%> (-11.69%)	:arrow_down:
client/types/callbacks.go	66.66% <ø> (ø)
server/callbacks.go	68.18% <100.00%> (-4.55%)	:arrow_down:
server/wsconnection.go	100.00% <100.00%> (ø)
client/internal/packagessyncer.go	59.25% <0.00%> (ø)
server/serverimpl.go	58.92% <95.00%> (+0.37%)	:arrow_up:
server/httpconnection.go	33.33% <0.00%> (ø)
client/internal/mockserver.go	82.35% <85.71%> (+0.31%)	:arrow_up:
... and 2 more

... and 3 files with indirect coverage changes

:loudspeaker: Thoughts on this report? Let us know!

[srikanthccv]

What was the directory you used to run the example server?

[JaredTan95]

What was the directory you used to run the example server?

Thank you for reminding me that I was in the wrong directory. So, I will close this PR.

[srikanthccv]

You can rely on the run-examples target without worrying about directory stuff.