fix(tools): cem demo paths and dev server (#2917) #10570

Job	Run time
Lint files	43s
Verify that build runs on Windows	1m 33s
Unit Tests (Web Test Runner)	1m 14s
SSR Tests (Playwright)	1m 39s
Compile project (22)	55s
Compile project (24)	53s
Validate successful build on main	3s
Publish Playwright Report	29s
	7m 29s

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