feat: implement file compression server

[valerij0412]

No description provided.

[mateacademy-ai-mentor]

Review Summary

Your solution is approved because it correctly implements all the core functional requirements of the compression server. The HTML form exposes a file input and a compressionType select with exactly gzip, deflate, and br, and it submits via POST to /compress as required. The server handles / and /compress endpoints appropriately, including rejecting GET on /compress with a 400, validating multipart/form-data with a boundary, and returning 400 for invalid form data or unsupported compression types. For valid uploads, you use Node streams together with zlib (createGzip, createDeflate, createBrotliCompress) to compress the file and return it with the correct extension (.gz, .dfl, .br), which matches the task specification. Non-existent routes correctly yield a 404, so the overall routing behavior is consistent with the requirements.

As minor improvement suggestions (not blocking): your manual multipart parsing could be made more robust to handle edge-case header formats, and slightly more descriptive error messages could help with debugging. Overall, you met the required functionality with a solid and standards-compliant implementation—well done.

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