#Production

Four commands that move a stack from its old layout into a new structure across major versions: export without changing the source's data, import each store the way its version allows, verify what really arrived, and rename modules while moving their data along.

One command that rotates an environment's internal credentials key by key: a dry run by default, a backup first, a unique value for every key, a real login to prove each credential that can log in, and rollback for any that fail.

Three commands that take a tested release into production without overwriting what production owns: they promote configuration structure but keep its secrets and addresses, refuse to copy new secrets, and apply schema migrations the images carry.

The digital signature platform of the City Government of South Tangerang: signers prove who they are, sign PDFs to PAdES B-LTA with certificates from the platform's own authorities, and anyone can verify the result — version 2, which I designed, built and operate.

Release Workflow: Development to Production is the procedure every change of mine follows from my laptop to production — which steps I automated, which I deliberately left to a person, why each step sits where it does, how I diagnose a failed release, and how I recover from it.

Its software reached the end of support, and its records must outlive it. One component rewrote data as it read it, so the migration copies rather than converts — an operation with no rollback has to be survivable, not merely careful.

Staging and production shared 136 keys, but 21 had to stay different, including the one that decrypts years of data. Promoting a release's structure, not a file's contents, keeps that key in place and stops a schema migration from silently never running.

Point one environment's volumes at another's data and the restore succeeds, every health check passes, and the database is empty. Separating networks, state and runtime identity is what keeps three environments on one host from quietly erasing each other.