chore(api/Dockerfile): pin alpine dependencies and bump watchfiles

JuniorJPDJrequested to merge
pin-alpine into develop

this needs to wait for armv7 builder in alpine to catch up (versions should be equal): https://pkgs.alpinelinux.org/packages?name=py3-watchfiles&branch=edge

reason: https://gitlab.alpinelinux.org/alpine/aports/-/merge_requests/41663#note_275653

Edited by JuniorJPDJ

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