Bump dockerfile-rails from 1.6.9 to 1.6.10

[dependabot[bot]]

Bumps dockerfile-rails from 1.6.9 to 1.6.10.

Release notes

Sourced from dockerfile-rails's releases.

v1.6.10

• check Dockerfile for common errors: missing packages, mismatched Ruby version

Full Changelog: https://github.com/fly-apps/dockerfile-rails/compare/v1.6.9...v1.6.10

Commits

• 393e227 push out a release [ci skip]
• a4b81d2 check Dockerfile for common errors: missing packages, mismatched Ruby version
• See full diff in compare view

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[dependabot[bot]]

Superseded by #214.