Bump node from 18-alpine3.17 to 20-alpine3.17 in /dockerfiles

[dependabot[bot]]

Bumps node from 18-alpine3.17 to 20-alpine3.17.

Most Recent Ignore Conditions Applied to This Pull Request

| Dependency Name | Ignore Conditions | | --- | --- | | node | [>= 15.a, < 16] | | node | [>= 19.a, < 20] | | node | [>= 21.pre.alpine3.a, < 22] |

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@dependabot ignore this major version

[dependabot[bot]]

OK, I won't notify you about version 20-alpine3.x.x again, unless you re-open this PR.