Combine a loopback-only service with a small database while keeping input validation, backups and schema changes visible.

Core Ideas

  • Bind development servers to 127.0.0.1 unless network access is deliberately required.
  • Use parameterised queries and transactions instead of string-built SQL.
  • Back up the database before migrations and test restoration, not only creation.

Decision Rule

A local prototype should still enforce input limits and avoid exposing debug services to the Wi-Fi network.

Apply It On Your Phone

Build a local notes API with create, list and export operations plus a tested backup command.

Official Sources

22 · Phone Technology And Maintenance

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