Bump dockerfile-rails from 1.5.4 to 1.5.5

[dependabot[bot]]

Bumps dockerfile-rails from 1.5.4 to 1.5.5.

Release notes

Sourced from dockerfile-rails's releases.

v1.5.5

exclude pids, storage directories in .dockerignore

Full Changelog: https://github.com/fly-apps/dockerfile-rails/compare/v1.5.4...v1.5.5

Commits

• 1a82984 push out a release [ci skip]
• 14953b2 update expected test results
• 811f476 exclude pids, storage directories
• See full diff in compare view

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[dependabot[bot]]

Superseded by #693.