Why PHP + SQLite + Docker instead of Node + Postgres?

Locked for this scale: PHP built-ins already cover hash + random + PDO, SQLite is 1 file with zero server, Docker gives PHP without native install. Postgres + JWT + mailer libs are noted as production upgrades, not v1.

How can :7001 talk to :7002 without being blocked?

Explicit CORS allowlist plus same-host pass for Tailscale. Preflight OPTIONS returns 204 with Allow-Origin only for listed hosts. Next app (:7003) just gets added to the list.

Why does the API sometimes not answer?

Not on a 24/7 VPS yet. Home PC, online daily 08.00–21.00 WIB (UTC+7). Outside those hours fetch fails and frontend shows a toast. Screenshots + curl logs remain as proof.

One Auth Backend for Many Frontends — PHP, SQLite & Docker Entry Point in a Day.

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