djrmun.com Notes on self-hosted infrastructure, backend systems, and the class of bug that fails silently. https://djrmun.com/ 2026-10-18T00:00:00.000Z djrmun Jolly List: a Christmas shopping app, and I need TestFlight testers https://djrmun.com/writing/jolly-list-looking-for-testers/ 2026-10-04T00:00:00.000Z 2026-10-18T00:00:00.000Z An iPhone and iPad app for budgeting, buying, tracking and wrapping holiday gifts. It's in beta, and I'm looking for TestFlight testers. Sixty-Two Days Without a Backup, and Nothing Reported a Problem https://djrmun.com/writing/sixty-two-days-without-a-backup/ 2026-09-20T00:00:00.000Z 2026-09-20T00:00:00.000Z A macOS disk-pressure incident, the three tools that misled me, and the four monitoring mistakes I made afterwards. nginx add_header doesn't merge, and it takes your security headers with it https://djrmun.com/writing/nginx-add-header-does-not-merge/ 2026-09-19T00:00:00.000Z 2026-09-19T00:00:00.000Z One add_header inside a location block silently deletes every header inherited from the server block. Your HTML keeps them. Your CSS and JS quietly lose them.