add createServer method

[krasnobokydima]

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[mateacademy-ai-mentor]

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[mateacademy-ai-mentor]

Review Summary

I am approving your solution. The server correctly parses the URL, performs the case conversions, and returns the expected responses. There is one minor issue: on lines 25–27 in src/createServer.js, the concatenated error message lacks a space after the period, resulting in required.Correct instead of the required required. Correct. This is a cosmetic formatting issue and does not block functionality, but it’s worth fixing to match the exact requirement. You can resolve it by ensuring the first string ends with a period and a space, or by including the leading space in the second string, so the final message matches the required format. Nicely done overall—clean handling of request parsing and responses.

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