imranemon.techPosts on .NET, EF Core, DevOps, Kubernetes, and cloud infrastructure — drawn from real production work.https://imranemon.tech/When OAuth Login 500s in Prod but Not Locally: The Migration That Never Ranhttps://imranemon.tech/blog/oauth-500-prod-migrations-never-ran/https://imranemon.tech/blog/oauth-500-prod-migrations-never-ran/A production 500 on every Google/Facebook social login, with a 42P01 'relation does not exist' error buried under classified rejection logs. Root cause: EF Core migrations were gated behind IsDevelopment() and never ran in production.Thu, 10 Sep 2026 00:00:00 GMTdotnetef-corepostgresqloauthThe Caddyfile That Committed Broken: File-Global Matchers Get Rejectedhttps://imranemon.tech/blog/caddy-global-matcher-rejected/https://imranemon.tech/blog/caddy-global-matcher-rejected/A security fix that never actually deployed: a Caddy request matcher defined at file-global scope is invalid Caddyfile syntax, Caddy rejects the whole config, and the bootstrap silently skipped it. Here's the snippet pattern that fixes it.Wed, 09 Sep 2026 00:00:00 GMTcaddydevopssecurityVirus Scanning a 2-vCPU VPS: Why ClamAV Became a Docker Sidecarhttps://imranemon.tech/blog/clamav-sidecar-architecture/https://imranemon.tech/blog/clamav-sidecar-architecture/Running ClamAV for user-uploaded document scanning on a tiny VPS seemed impossible — 1GB RAM for the daemon, plus cold-start signature loads. The architecture that made it work: a ClamAV sidecar container speaking the clamd INSTREAM protocol.Tue, 08 Sep 2026 00:00:00 GMTdotnetdockersecurityarchitectureEF Core NoTracking Broke 50 Repository Methods, and I Reverted Ithttps://imranemon.tech/blog/ef-core-global-notracking-revert/https://imranemon.tech/blog/ef-core-global-notracking-revert/A one-line 'performance optimization' — global AsNoTracking in EF Core — silently broke every fetch-then-mutate pattern in a 50-method repository layer. Here's the failure mode and why I rolled it back.Mon, 07 Sep 2026 00:00:00 GMTdotnetef-corepostgresqlThe Two-Second Crash: Debugging Hangfire.PostgreSql on a Fresh VPShttps://imranemon.tech/blog/hangfire-postgres-enlistment-crash/https://imranemon.tech/blog/hangfire-postgres-enlistment-crash/Our API container kept dying ~2 seconds after boot on a freshly rebuilt VPS. Caddy 502s everywhere. The culprit was a transaction-enlistment mismatch between Hangfire.PostgreSql and Npgsql.Sun, 06 Sep 2026 00:00:00 GMTdotnethangfirepostgresqldocker