Fix/validate numeric and positive input for place booking#338

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elof-dev wants to merge 7 commits intoOpenClassrooms-Student-Center:masterfrom

elof-dev:fix/negative-or-zero-booking

Commits on Oct 23, 2025

Fixes #7: update server.py and index.html to display board + tests
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Fix/invalid bookings (empty, zero, non-numeric or negative values)
elof-dev
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